I have been making a few bucks doing small time repairs, mods, etc...I bought this particular Vibrant ( standard 50-80$ craigslist cracked screen/LCD broken) knowing I had two good Digitizer/Screen replacements. After replacing everything works but the screen. The phone boots, audios good, lights and buttons/touchscreen work fine just with a blank screen. I have tried everything I can think of...I don't know what could be causing this on the motherboard? There are no visible problems or missing/discolored resistors etc on the main board, the USB mounts and charges well, I know the digitizers are good so I'm stumped? I've done this replacement many times and have never seen or can find any instance of this online.
Related
So I cracked my LCD screen, bought a replacement, opened up the phone w/ little incident (man they really do cram a lot in there!) and I powered it on.....
the screen is just white, if I fiddle with the connection at where the LCD connects into what I believe is the digitizer I can kind of see a keypad button layout.
What do these symptoms describe and does anyone have a link to the service manual?
Thanks in advance for your time.
I had to replace the LCD on a wizard so here my experience... Make sure the two data ribbons are inserted securely. Also, before you power on, plug your hermes into your computer (assuming your computer is on and logged in as an admin) via USB (this sounds weird but I had to do this for some reason....) and then turn on the wizard.
If you still have a problem, you may have damaged something more than the screen.
Good luck.
Ok I will give plugging it in a shot.
Before you plugged it in what did it do when you powered it on?
anyone else have any input on what the issue could be?
It could be wrong LCD. There are two types of LCD for hermes/wizard with same connector but they are different. One is with gold flex cable, the other is with black flex cable. First one is most popular on wizards, the other on hermes. Check what was the color of your previous lcd flex cable and the new one.
Instructions
Can anyone post the instructions on how to take the lcd apart ?
I have gotten this far
http://www.howardforums.com/showthread.php?t=1152710&page=1&pp=15
I'm a bit afraid to go on without instructions
Here is the lcd I got
http://cnn.cn/shop/8525tytn-touch-p-87.html
Hey guys.
Just looking for a damaged jasjam or dopod or hermes etc etc.
Needing a main board by the looks of things. Seem to have blown the charging circuit in the phone. Assume this is apart of the mainboard. Have tried new battery, charger, usb doesnt work etc.
So if anyone has a mainboard or complete phone i could buy please let me know.
PS i have had a lil expirience with it before. i smashed the lcd and got ahold of another. Replaced it and worked a treat till i fried it
Ahh well.
Cheers
Matt
My Touch Pro (HTC Raphael) is acting up, the screen continuously jumps or goes completely black, the digitizer doesn't respond right, and the power button doesn't work. The navigation control doesn't work right either.
6/27/10----- 3:49 p.m.
I found out where the problem came from, it's from the socket on where the flex cable from the screen part of the TP connets to the motherboard. if anyone knows where i can get a replacement mother board please let me know!
I attached some pictures with the board and the jumpy screen.
why replace board if you can replace phone?
I had similar problems a couple weeks ago, on a TP that is more than 1 yr old - local Sprint store told me to get it replaced under the Total Equipment insurance plan I have, but that would be $100 ... called Sprint customer service, they symptom-diagnosed it as loose/failing cable, so they swapped it out as a manufacturer defect, I had a replacement phone in 2 days, with return mailer included. On the phone maybe 20 minutes total.
Flex Cable is bad
The flex cable is bad. PM me and I'l explain how to fix.
So I replaced the digitizer on my dna and afterwards I get no response from the phone. So I was thinking the screen was DOA, and I ordered another digitizer from a different seller on ebay and still got nothing. I plugged it into the pc to see if I could force it on, I did the hard reset, and stilll no response. All cables are perfectly fine and were cleaned with alcohol. Bought a new battery and still nothing. What could it be? Help please.
sounds to be a motherboard issue
Double check those ribbon cables that go from the main board to the front camera/headphone Jack. The ones held on with two screws . Unhooking them and reseat , be sure your hearing or feeling a click. They are very precise.. if you are absolutely sure they are seated correctly redo battery connection. .... if all checks out .... just place it on charge for a long time. Maybe your board is dead
Hi all,
Recently, I bought a Sony Xperia Tablet Z of which the previous owner had removed the whole screen. Tablet was working, then he dropped it, causing the screen to be broken (LCD was blacked out, tablet and digitizer/touch still working). He removed the screen assembly as a whole, had the intention to replace it but he just sold the rest of the tablet.
So I obtained an LCD/digitizer assembly form AliExpress, but after installing the screen and switching on the tablet, I got the same problem: Touch is working fine, tablet switches on nicely, I get some kind of 'blind-modus?' that responds to touch with sounds, it tells me I'm swapping through menus, but the LCD itself does not give any signal. Linking it to PC works fine too. Linking it to a TV requires an MHL cable, which I don't have...
My question is:
Does anyone know if this is a well-known problem after dropping an Xperia Tablet? I'm more or less sure it's not the LCD of the replacement screen that causes the problem (given the background), so the problem might be in the LCD flex cable, or worse, the logic board. But how to find the faulty component?
For the flex cable: I've tried to measure (multimeter) the resistance of the wires between each tiny pin of both the connectors of the ribbon, but it's not easy. Some pins on one connector are linked to multiple other pins of the other. Is there an easier way to check this, anyone any experience with this?
If it's the logic board, is there any way to make sure which component is broken, and is this fixable?
If it might help: I have a set of pictures of the logic board / flex / LCD.
Otherwise, I might just try and stop by a tablet/phone fix shop, ask kindly if I could quickly check one of their screens/cables to verify which parts are working/broken.
Thanks in advance!! Kind regards
Edit: I just noticed there is a specific forum for Xperia Z (one), this thread belongs there, sorry! Could this thread be moved there?