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So i see there are a few other threads but none that i found were quite like this. My phone randomly restarts and goes to the white screen that says stick together and won't load back up, also when i reset or take the battery out unless i have held the phone infront of my AC in my car or put it in the fridge/freezer it will not boot back up, it has heat issues but it's not actually that hot, i used to play playstation games and it would get much hotter and not freeze like this, it randomly started happening a couple of months after I got it.
it will freeze often in any temperature that is not considered cold, even in room temperature it will do it, any time i try to load my playstation emulator or use the internet it has a very high chance or resetting and not booting,
if the phone gets warm at all though it's a garuntee that it is going to happen, it just depends on when, i could just be finishing a call, sending a text etc, it will happen, and the only cure is putting it in the fridge.
i'm going to guess I have a virus of some sort or something really messed up in the ROM, but i've switched ROM's and it still does it,
should i do the SD card hspl back to SPL and try to find a legit original rom copy or is there a better solution for this? i.e deleting all my addons and going with a different ROM?
my rom history is TOUCH XTREME, Miri and Dinik(this is where it started) and now Energy(it is still happening here)
might be a good idea to go back to stock, though you dont need to remove hspl at this stage, just flash your phones original rom over usb, and have a real close look at the battery pins, they can often get bent leading to all kinds of reboot issues.
If its still the same under stock rom, then maybe remove hspl (no need for sd card flashing, can remove it using hspl2/hspl3(for tmous))
one of my pins was actually bent a while back! i bent it back to the shape it's supposed to be and used a safety pin to widen it back up so it looks like the rest, do you think that caused permanent damage? and if so is there something i can do to the pins to make it work right again? and not reset so easily
Well, i reflashed the stock SPL and ROM and yeah it won't even turn back on, just stays on the white stick together screen. it's done, being replaced by tmobile next week.
hmm, could be, perhaps if the pin is cracked a little, affecting power flow. not sure what to suggest.
I got the exact same problem as lllpulselll. I have already done a lot of things but none of them worked for me.
I did an hard reset
Tryed a lot of different rom's
Used the telephone al while without SD-card but still the same problem.
But I read somewhere that ik could also been your Sim-card, is that logic or not?
And by me also one of the pins by the battery is not right so I will that try to.
(Sorry for that bad English)
looks similar to overheating, you could install BattClock (it can monitor batery temperature) to check whether the self-reset happens at the same conditions,
had the same issue, finished with new mainboard (replaced under warranty),
during worst moments before repair I had to put my Leo in the fridge for few minutes before it could restart
p107r0 said:
looks similar to overheating, you could install BattClock (it can monitor batery temperature) to check whether the self-reset happens at the same conditions,
had the same issue, finished with new mainboard (replaced under warranty),
during worst moments before repair I had to put my Leo in the fridge for few minutes before it could restart
Click to expand...
Click to collapse
That's probably it then, probably bent the metal things connecting to the battery and messed up the flow causing the battery to overheat or think it's overheating somehow. sucks that that is all that's wrong with it and it has to be replaced, wish the prongs could be repaired.
lllpulselll said:
probably bent the metal things connecting to the battery
Click to expand...
Click to collapse
not necesserilly so don't blame yourself - mine had faulty mainboard (not battery) probably from the very beginning, but as it was purchased in winter, the symptoms did not show up until late spring, when outside temps grew
Its been doing this for a while. I'll go to check it and it's off, but the battery hasn't died. Last night it did this so my alarm didn't go off for work this am. Everything is stock on my phone. N
stock everything so please don't ask what rom/kernal/whatever ..
Any suggestions? I can't be late to work again because this phone is for ****
If you are absolutely sure that your phone is completely stock, then the problem is probably your battery. Does this only happen when the phone is not plugged in?
It does it when its on the charger too. Like I woke up this morning and found it off but it was on the charger when i found it like that. i havent flashed anything or changed any roms or kernals which is why I say its stock. otherwise people ask me what rom im using or whatever.
It could possibly be a lose battery. Generally people will notice it when there is movement to the phone i.e. shaking it or dropping it. If the phone is completely still when it randomly shuts off chance are that a lose battery is not your issue. Still its worth looking into. Most people fix a lose battery with a small piece of cardboard wedged between the battery and case.
Good luck!
Probably not a loose battery. I just had it charging for the past hour and went to check it to find it turned off. Any suggestions as to why it happens when its just sitting there charging?
My phone did the same thing, and with my wife having the same phone I was easily able to rule out battery. Since your complety stock it sounds like a problem with the phone. If your with Tmobile give them a call and see if they will replace it, they did for me.
Sent from my SGH-T959 using XDA App
My phone is already a year old tho. i think my warrenty is gone,
(At least in my case) the warranty didn't matter. I had a 100% bricked vibrant and I told them that "it just happened" and no one was the wiser. I got a replacement and all I had to pay for was shipping. So my advice, tell the T-Mobile rep: my phone is broken through no fault of my own and I want a replacement.
Edit: that stuff happened like a year ago so I don't know if that policy still applies. Hope this helps though.
I did download Load Monitor and made the settings a certain way. so far it hasnt shut off. We will see if I am late to work again tomorrow.
even some stock Samsung roms (like kb5 and ka5) lately have had the same turning off problem for me as well. i think it has to do with some of the older vibrant's when the hardware (battery) becomes charged or is depleting slowly, triggers a software issue like a discharge error forcing an emergency shut-down to prevent damage. the only thing i can recommend it to take the advice of previous posters and get a replacement or upgrade if you are nearing the end of your contract.
just a few things to consider.
Have you tried, I know this sounds odd, a drastic ROM change? Not just switching between Froyo ROMs, but moving to a Gingerbread ROM like MIUI? Could help isolate the problem if it keeps happening under a different OS.
my problem is gone now that i use custom roms. the same could help you thread starter.
Edit. i know you refer to developers as op's but do you do the same to a thread starter?
Pretty sure OP stands for "Original Poster", as in the person who started the thread. Developers start a lot of threads which is probably why you thought it referred only to developers.
Since installing Load Manager my phone hasnt shut off by itself. Seems to have fixed the problem!
First I apologize if this is an already discussed issue. I searched for something similar, but could not find any. If you think this is a repeat, I would be grateful if you can give me a link.
Now, my story. I have been using my SGS2 from July 2011 and happily so. My last phone is an HTC Desire (which I still use) running CyanogenMod 7.0.3. However, I found TouchWiz's annoyances less troublesome than HTC Sense, and did not do any modification on my SGS2. Not even root. Still running stock kernel.
Today, I was taking pointers during a conference using the Samsung Notes App, occasionally taking the SGS2 in and out of my pocket as required. At one time, when I took it out of my pocket, I found that the display did not timeout, and the Samsung Notes App was showing. I tried to tap on the edit icon, and nothing happened. I pressed the "Home Button", nothing happened again. And, still nothing happened when I pressed the "Power Button".
I took out and put back in the battery, and pressed Power Button, but still nothing was showing at all on the screen. I put the phone in my pocket for the conference to end, but after 5 mins or so, I noticed my pocket getting noticeably warm. Taking the SGS2 out revealed that the area around the camera (probably where the processor is) was quite hot. I took out the battery and kept it separately in my pocket.
When I got back home, I tried to put the battery in again and switch it on. No response, same as before. I plugged in the USB charger, and still no response, and the processor area became quite warm if the battery was in.
I really do not know what went wrong, or what I did that triggered all this. Is the hardware gone for good?
There are also some important documents on the phone that I created using Polaris Office, which are on the phone memory. Even if the phone is lost, is there any way that these documents can be retrieved?
I have not contacted Samsung Support yet, but before doing that I was hoping perhaps someone over XDA with more knowledge than the techs in Bangladesh, would be kind enough to give his opinions.
Next time, install Dropbox and/or Box and/or Minus and make backups.
This time, good luck getting it fixed and your data back.
Thank you for your suggestion. Any idea if this hardware is gone or not?
Can you enter download mode? If so, it's not bricked. Take out the battery, then put it in, hold volume-down and home and turn it on.
If you cannot enter download-mode, it's bricked. If you cab, I can help you make it running again. If this is the case, three are two possibilities. A software- or a hardware-fault. If it's the latter one, you can just get you device replaced. If it's a software-fault, a J-Tag-repair would do the job.
Sent from my GT-I9100 using XDA App
I tried the download mode earlier, and I tried it again now, still now help. No activity at all! How do I find out if this is a hardware fault? Is the processor area heating up any indication of a hardware fault?
So, no access to download mode? ie the screen stays blank with no sign of life.
If so, then I think all you can do is send it for repair/replacement.
Honestly, if what you're saying is true and one day your phone just stopped working it sounds very unlikely its bricked. Unless you're running at OC'ed frequencies or really low voltages I've never heard of a phone just giving up and bricking itself. If you really cant get into DL mode then sent it for repair but are you doing it correctly? Power button + volume button down + home button, don't just press it, hold it until you see something happening.
That was what I thought, how could it just go kaput without any "dangerous" things that I could've done on Android. But, I didn't do anything, at all. No custom kernel, no root, no overclocking.
And, I can't get into DL mode either. I tried to hold the Power Button + Volume Button Down + Home Button, and held it for over a minute... and still no movement on the screen.
On top of that, the area around the camera just got HOT... The processor is probably located there.
I even opened the battery and put it back in, didn't press any buttons, just connected the charger. Nothing happened, except after a while, the area around the camera just got HOT...
So, no ideas other than talking to Samsung support in Bangladesh? I hope they are cooperative!
Have you tried with a jig USB adapter?
http://www.amazon.com/SainSmart-Dongle-Samsung-Captivate-Vibrant/dp/B0053H73JQ
Switch of the phone, plugin the jig and wait 5 sec.
https://www.youtube.com/watch?v=9YRPWU4waa4
Brings you to the ODIN mode. I suppose, if this does not work, something is wrong with the hardware.
It seems an hardware failure.
It increasingly seems like a hardware failure. I went to Samsung office here in Bangladesh, and to my utter surprise, they refused to honor any warranty for an "out of country" purchased phone.
I got this phone from India, and just read the terms & conditions on their website. It says, the "warranty card" should've been filled out and sent back to them within 2 (two) weeks of the purchase, which I did not do. Increasingly it seems, I am out of luck totally.
It cost me around $700. I bought from an authorized store. And, still, I get no service. Very disappointing.
Have you tried using a jig? You might get it into download mode and then you can flash a ROM with ODIN
There is no activity on the phone at all. No display, nothing. Do you still think the Jig might work? The area around the camera gets hot when the battery is put inside.
seem like hardware issue..
if software prob it should able to bootup and show something on the screen..
do it have anylight on screen/button?
did u try usb jig?
if no i think only way is bring to Service Centre..
Hey XDA!
I'm having an issue with my Galaxy S2 I9100. Basically the problem started a while ago when I dropped it and the screen shattered. I wasn't willing to get the screen replaced so I bought a replacement screen off of eBay and replaced it myself. At first it seemed to be in complete working order and everything was going great. However, over time I got an issue of the phone turning off and me having to restart it. It would come at the most random times too, I would be going about my business and the phone just randomly turned off. The problem progressed and got worse and worse and the shut downs would be more frequent. I remedied the problem by keeping the phone plugged into the A/C adapter and it wouldn't shut down while it was charging. It got worse however, and I could barely turn on the phone without it completely shutting down after a few seconds, and even when it was charging it would still turn off. So basically my question is how can I fix this? Is it a hardware problem and something that I shouldn't try to fix because its not worth it? I tried even resetting the phone to factory settings and everything I had in my knowledge to fix it but nothing would work. Would it be just worth it to sell it as spares? Thanks for helping me out!
That sound like the battery is dying, not the device.
Get a genuine samsubg battery and try it out.
Sent from the little guy
gastonw said:
That sound like the battery is dying, not the device.
Get a genuine samsubg battery and try it out.
Sent from the little guy
Click to expand...
Click to collapse
Allright, the battery seems to have expanded a bit as well I should note, so that may be causing the problem. I have a friend with the same phone so I'll try his battery to see if it makes a difference.
Swap it & share the outcome with us.
Sent from the little guy
Battery expansion is a sure sign that the battery needs replacing, and the other symptoms you describe are common to a failed battery too........
If the battery has expanded, that is an indication of a build up of gasses within the cell.....the battery is now pressurised....it could physically fail at any time....best to take it out and throw it away before it leaks fluid all over the inside of your phone. Further charging will only serve to increase the risk of failure.
Sent from my rooted, de bloated, stock JB powered S2 via PhilZ kernel and XDA developers app
Oh god I feel so stupid now lol. Yeah I tried it with another battery and the phone works completely fine nothing wrong with it. I guess I'm gonna order a replacement battery off of eBay tonight and sell my phone once it arrives. Thanks so much guys! :good:
Just for future reference however, how is the battery expansion caused and what are some ways to prevent it? Thanks again.
'Old age'. You can't. When the battery begins to expand & feel 'squishy', it's time for a new one.
Hi guys! I'm new around here, I've been lurking the forums for the past year or 2.
I originally had a i9000. Had it rooted, flashed & running 4.2.2 Hellybean, it was a dream, easiest android phone i've ever dealt with.
Today, I bring you a device that is so mind boggling and mysterious, it's ridiculous. Before you ask, yes I've searched and searched countless hours on end & sleepless nights. Trying to work out how to PERMANENTLY fix this device.
Straight up, I'm going to tell you what I've done, what I've tried, where the phone came from, model of the phone & all the useless stuff.
OKAY. Go.
I got the Samsung Galaxy S2 (i9100T) off a friend recently, about a month or two back. He didn't have a back cover for it, and the camera was all smashed up (back camera). It was running on 4.1.2 Vodaphone Stock DVLSH. It had a few issues when the phone got to me.
I wasn't sure if the phones battery was depleted, but I had to muck around with the phone for a couple of hours just to get the damned thing to turn on.
When I had got the phone to turn on, I kept getting "Warning! Battery Disconnected!" messages, this was frustrating. I eventually let the phone fully charged before I mucked around with it and ignored the warning.
When it was fully charged, I went straight to rooting it. I first rooted it by flashing CF-Root and then flashed a custom rom. (Xylon AOKP. 4.2.2)
From here on, the phone started to randomly restart, drop signal, lose battery after random restarts, get semi boot loops.
So I flashed a different stock (XWPL8) and got rid of the Samsung Galaxy SII i9100T boot logo and it was changed to Samsung Galaxy SII i9100.
After this, I then again rooted the phone but this time a different method and used Siyah kernel and flashed Carbon rom 4.2.2.
I still encountered the same problem as Xylon 4.2.2.
So I kept reverting back to stock, re-rooting & trying again.
I've tried countless methods.
POSSIBLE HARDBRICK RECOVERY DON'T TAKE MY WORD THOUGH: I've even managed to HardBrick the device (yes I mean hardbrick, i didn't even JTAG to bring it back... I flashed Dorimax Kernel at some point and it hardbricked it to all ****.) I spent a few days trying to unbrick it when finally I just plugged it into the charged and forced it to internally turn on (i believe) and let the battery deplete (the phone was hot even when i unplugged it. So I let the battery drain.) Yes I even battery pulled and tried to reboot it to see if I could boot recovery or download or the rom even before I tried any of this! (absolutely nothing.)
I took out my SIM card after a full day of letting it drain (just to be sure) plugged it in, took out the battery while the charger was plugged in, put the battery back in, unplugged the charger while holding power, and plugged it back in and I got the charging logo booted into download mode after 80% charge and flashed stock again.
Now the problem(s) with the phone:
SEMI-BOOTLOOPS: Every time i've rooted the phone and even flashed different roms just to make sure, it does a "semi boot-loop" I've searched everywhere for people with the same problem but found nothing on it.
What it does, is it turns on (boots the samsung logo.) turns off, turns back on, turns off, turns back on etc and then after about 2-8 times of doing is usually it boots to the ROM and the phone works for awhile.
RANDOM REBOOTS: I don't get these much anymore since I found a solution where someone had just folded up a receipt and pushed the battery up against the prongs because it had about .5mm movement off the prongs. This fixed most of the random reboots and don't see many anymore.
SLEEP OF DEATH!?!?!? OR JUST A BLACK SCREEN THAT DOESN'T TURN BACK ON!?: This one I'm not 100% sure what it is, I read it's the S.O.D (Sleep of Death). Which is common on 4.0.4 and was apparently fixed in later Android versions. But sometimes, when I lock my phone, or my phone goes to sleep, the screen stays black even after I press the home button or the power button, at first I thought just restart it by battery pull or holding down power like everyone says, yeah it works, my phone boots up and does a semi-bootloop and goes back on eventually, but one day I left it on in the mysterious S.O.D. and waited 5-10 mins pressed the power button and it unlocked... This one really has me baffled and it does it a LOT.
REALLY BRIGHT SCREEN AFTER REBOOT SOMETIMES!: Okay, so sometimes when the phone finally turns on, the screen is really bright, like the brightness is still on half, but it's a lot more noticeable on how much brighter it is, it's nearly like a white.
It's really really BRIGHT. Phone shouldn't be able to look/get that bright. After a reboot though it goes away and goes back to normal but this leads me to believe something to do with the battery just a hunch.
RANDOM FREEZES!??!?: Sometimes the phone will just randomly freeze, I can be doing something and it'll just freeze, it won't turn off, I still get picture on the screen but it's frozen and I can't do anything until I either battery pull or reboot it by holding down the power button.
Before anyone asks, yes, I Factory Reset from recovery, Wipe Cache & Dalvik Cache before, I flash a new rom etc.
- My GApps matches with my Android versions each time.
- The ROMs I have flashed are compatible with my phone.
- And I've made sure everything I have done is completely compatible with my phone and android version.
What I think!:
SEMI BOOT-LOOPS:
This one, I don't think much of, it's got me baffled. It could be something to do with the Boot-Loader, could be something to do with a bad flash (but I've even tried double flashing a single rom.)
the eMMC could be damaged in a certain way that it causes these self proclaimed "semi boot-loops"
RANDOM REBOOTS:
This one, I've pretty much fixed with the help of lurking the internet over and over for hours, so this indicates a battery problem, will be replacing it this week. (Yes I'm aware that this battery problem could be causing everything else to play up and that it could all be due to the battery but can we leave the battery out of this just for now so I have more options on how to fix it.)
SLEEP OF DEATH!?!?!? OR JUST A BLACK SCREEN THAT DOESN'T TURN BACK ON!?:
I believe that this could be due to either a high load on the CPU (maybe not so much high but a really low load that it goes into a state of nothing for awhile.) It drops into a mode where it's turned off (something bigger than deep-idle.)
REALLY BRIGHT SCREEN AFTER REBOOT SOMETIMES!:
I haven't changed voltages or messed with any voltages on my phone, but I believe that it does indeed have something to do with the CPU & GPU voltages or even the BATTERY Voltages either undervolting or being to high.
RANDOM FREEZES!??!?:
I think this one is something to do with my phone not liking the voltages stock set to it.
I read that somewhere Freezing the System Alarm Clock can fix the random reboots, so I've done that and also pushed the battery up with a bit of receipt so it touches the prongs completely.
Anyway, right now, the phone is on Stock Kernel with CWM Recovery6, with PacMan's 4.3.1 Nightly release on XWLP8 Baseband and it still does this all.
I know i'm asking for a lot of help and I'm probably going to get yelled at by Devs or forum mods or some body because I've done something wrong.
But if it doesn't belong here, move it please.
IT TRULY IS A PHONE FROM HELL.
-Thanks, Just another man who wants to fix silly problems for fun.
Youve said "dont mention get a new battery".What if that is the problem.
Maybe the phone has water damage, or it needs that hawkerpaulls scripts run.
Youve just got to try free stuff, then maybe splash a bit of cash I.e battery.
Nothing software/firmware-side is fixing this. Phone has major hardware issues going on. I wouldn't bother beyond trying the 'free stuff' TheUnderling mentioned.
erm - I'm agreeing with you on this 'phone from hell!' also agree with @theunderling and @MistahBungle - it doesn't sound like its worth fixing if the free stuff doesn't work - sounds like it would probably be cheaper to buy a second hand s2! Don't think dori kernel had anything to do with your 'hard brick' - I've been running dori for some time including the experimental builds, dori tests everything himself as do his team of testers - the 'd team' and I have never known him to release anything that even soft bricks let alone hard bricks.
Good luck :cyclops:
Hey guys thanks for the speedy replies! I love waking up to instant replies!
theunderling said:
Youve said "dont mention get a new battery".What if that is the problem.
Maybe the phone has water damage, or it needs that hawkerpaulls scripts run.
Youve just got to try free stuff, then maybe splash a bit of cash I.e battery.
Click to expand...
Click to collapse
Sorry, I was half asleep when writing all this! I am getting a new battery this week! But I wanted to have a go at trouble shooting it but crossing out the battery from the list of problems seeing as it's being replaced this week @theunderling
MistahBungle said:
Nothing software/firmware-side is fixing this. Phone has major hardware issues going on. I wouldn't bother beyond trying the 'free stuff' TheUnderling mentioned.
Click to expand...
Click to collapse
It may sound like it @MistahBungle but I have faith and I come down to being very patient with technology even when I do reach ticking time bomb mode. I believe I can fix it if I just get the right help !
If the new battery doesn't do anything, It might be the logic board and i'll just go buy a new one.
Jimsilver73 said:
erm - I'm agreeing with you on this 'phone from hell!' also agree with @theunderling and @MistahBungle - it doesn't sound like its worth fixing if the free stuff doesn't work - sounds like it would probably be cheaper to buy a second hand s2! Don't think dori kernel had anything to do with your 'hard brick' - I've been running dori for some time including the experimental builds, dori tests everything himself as do his team of testers - the 'd team' and I have never known him to release anything that even soft bricks let alone hard bricks.
Good luck :cyclops:
Click to expand...
Click to collapse
@Jimsilver73 It really is!
I'm not the most wealthy person or have money to just throw at things like new phones etc etc. I'd love to see what I can do on my side and try and trouble shoot every problem for even the simpilest of DIY Solutions. I get a kick out of mucking with phones and computers.
Your probably right, but I was thinking that does Dori kernel keep stock voltages or does it change the voltages at all? Because it just managed to Hardbrick its self a few hours after flashing it which was odd, which led me to suspect that my phone didn't like the Dori Kernel & Carbon Rom Combination!
@theunderling I will try that Hawkers script by the way!
Is this the one? http://forum.xda-developers.com/showthread.php?t=2100558
Phone having no back cover and camera smashed suggests that there is a physical damage to the phone, i wouldn't even try battery to this one, it may just kill the new battery if there is some kind of water damage, tho you seem like having fun trying to repair it Yes, that's hawkers script, use it and couple of ROMs, (ICS,GB etc) to see if there is a software problem. If you can dissamble it, you can check if there are some contact problems between pieces.
Hi @Dakura thanks for the reply!
The camera isn't smashed completely, but at fist I thought that the camera would be screwing up the phone in someway.
I know for sure as well that there is no water damage, and the phone was just sitting around he lost the back cover randomly after he had bought an iPhone 4S.
I can disassemble it, I just need to find my little screw driver I use for stand-off changing on PC cases.
I read somewhere that the proximity sensor has a bit to do with things, so seeing as the back cover isn't on, that maybe dust got into it while it was in his draw and that's the reason for screen-offs? because the phone is still responsive. I can receive calls & text messages just the screen is black and doesn't come back on.
The warning in 4.0.4 "Warning! Battery Disconnected!" leads me to think that in versions above 4.0.4 (4.1.2 for example) don't have warnings and the phone just turns off.
**major update**
@Dakura @theunderling @Jimsilver73 @MistahBungle
Hey guys, so I've just taken the back CASING not the cover. Off the phone.
I've been looking for breaks in solder points on the Logic Board and around it.
- The Camera ISN'T smashed it was the lens on the case..
- Looks a tad dusty.
- Semi Boot-Loops have disappeared! booted the phone with the case off and the semi boot loops are gone tried booting multiple times each time with success!
- No breaks on the logic board from what I can see as far!
- For some reason the Camera app would not connect to the Camera. "Can't connect to Camera!" maybe the camera flex cable isn't in properly.
- First boot with case off, battery gave false reading of -1021032418914 (something along those lines). That's usually caused by a lose battery correct me if I'm wrong?
- Everything seemed a lot more responsive and working.
Hmmm.
So removing the screws and taking the back casing off made the Semi Boot-Loops go away.
Maybe a part of the back casing was pushing on the Logic board and shorting it out?
Maybe the screws torque where messing with it (e.g. on a HDD with computers the simpliest change in toque on the screws in the HDD can screw the HDD.)
But the torque of the screws where very loose.
Any ideas are much appreciated!!
Yep, probably a short-circuit or dust problem or displacement somewhere around there. What you said proves that somehow the phone was physically damaged. You may need to actually disassemble all the pieces, inspect them and put them all back together, and it still may not work, for now, try cleaning the dust and tighten the screws, fasten the board.
@Dakura thanks for the help today Dakura!
Finally got around to putting everything back together after an evaluation, made the flex-cables all snug and tightened up the screws a lot!
The phone appears to be working now.
at 100% it even vibrates now when i tap things it never used to.
I couldn't quite locate the problem, but I have a feeling that one of the flex cables could have come loose but only just enough to generate fluctuation of power between full and under to keep the phone on.
Hopefully the phone stays stable!
@theunderling thanks for recommending me HawkerPauls Nuke script, I'll be using that every time I re-rom my phone from now on!
Will update the thread on a possible fix for anyone else with this problem.
It's always good to run through every possibility and solution to fix problems before going out and blowing money.