[HELP]"yellow screen emergency mode" "Error! Partition Table" - Optimus One, P500, V General

Hi all,
On a regular P500 with stock Android 2.2, build FRF91, software version LG-P500-V10b, the yellow screen Emergency Mode!! appeared after a regular restart and would go any further. I couldn't connect this situation to any of the apps that were installed.
Also, on regular usage, the Emergency mode scrren may appear out of nowhere and the phone is off the network.
This phone is used by my wife, she's not a hacker, she just want's to sleep the baby with melodies from this phone.
If I let the battery out for more that 15min it will boot back the normal way, but it isn't seen by Windows, it senses the device when plugged in but it says "device unplugged"
I followed several guides in the forum, and I saw there are two ways of writing something to the device:
1. "downgrade" the phone to the original firmware, like here Guide for newbies - LG OPTIMUS P500
2. write a new ROM, like here [ROM] (OFFICIAL) [email protected]_2.3.3_v2- Power Menu +franco-kernel+New Boot+ How to Guide
My obvious problem is the phone not being seen by Windows. I started it on purpose in Emergency Mode with Vol up+back key+Power and it appeared in device manager as LGE Mobile USB modem #2.
First I tried to write a new ROM, like at point 2. above, with LGMDP THUNDER v1.5, but I run into this error, after pressing the Start (write ROM button): Error! Partition Table. Here is a screen shot.
The I tried the other option, to "downgrade" the phone to the original firmware, with KDZ Updater.
I found V10E_00.kdz, although I think I should use V10B but I didn't found it. Search on this forum is a pain because it works one time in a hundred (it says something about maintenance).
KDZUpdater did its job successfully but the phone rebooted and halted on "Android" screen, that's it. Then I removed the battery, powered it back up and, surprise, my friend the Emergency Mode!! is back again.
So this phone doesn't seem to be bricked, nor isn't stuck forever in emergency mode, but also is not reliable anymore because of the emergency mode appearing randomly.
Please, slap me in the face with a link saying "dude, search worked for me an here's the fix".
What I can tell you for sure is that I didn't saw the partition table error before on this forum.

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hmm... try again with kdz with correct version and do all things again but wait until all works done. don't be so fast
and come here again and tell what happened

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If it is stuck on android logo after flashing kdZ, take out battery and press voldown+home+power button to hard reset
Sent from my LG-P500

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Indeed it was stuck on the android logo after flashing with KDZ. Hard reset worked!
Thank you! Thank you! Thank you!
After this I had Android 2.2.2 running, then I started LGMobile software updater Agent from LG PC Suite and it updated the OS to 2.3.3. After finishing, the phone rebooted to Emergency mode again, but I did another hard reset and now it works perfectly, it reboots properly.
I guess the root problem was a corrupt file system.
A little offtopic since we are at it. for you guys what proved to be the best rom/kernel combination for best battery life?
Thanks again!
Later edit:
New updates: the phone doesn't behave normally as it began above. Later after the update, I tried to connect the phone to Windows PC and surprise, it didn't saw it as it was supposed to, the problem encountered at the beginning of this post reappeared:
Device driver software was not successfully installed
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Although I have the correct drivers, because when I connect a friend's LG P500 it is seen properly.
After this, I rebooted the device and, surprise again, it booted to Emergency Mode. I unplugged the battery and let it for a while, then it booted normally but still it isn't seen by Windows.
Is this a software (ROM/Kernel) issue or a hardware issue?
I mention the my friend's LG P500 has the same factory provided update with Android 2.3.3, build GRI40, soft version V20g, kernel 2.6.35.10-perf [email protected] #1 and it doesn't have any problems.

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Update: I can not even charge the device after I power it down. When I insert the charger, the emergency screen appears right away and it stays that way. I don't know even if the device is charging.
The workaround is to unplug the battery and leave it for 15-30 min or more and then it starts properly, but the problem in the post above is still present.

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lmihaila said:
Update: I can not even charge the device after I power it down. When I insert the charger, the emergency screen appears right away and it stays that way. I don't know even if the device is charging.
The workaround is to unplug the battery and leave it for 15-30 min or more and then it starts properly, but the problem in the post above is still present.
Click to expand...
Click to collapse
Just try using froyo, dont upgrade to gingerbread, and see the problem still persist.

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aspee said:
hmm... try again with kdz with correct version and do all things again but wait until all works done. don't be so fast
and come here again and tell what happened
Click to expand...
Click to collapse
What is supposed to be the correct version? I tried these rom's: V10A_00.kdz, V10B_00.kdz, V10E_00.kdz, V20B_00.kdz with KDZ Updater in all possible combinations and got the error "Upgrade error WParam:100. LParam:502" at each attempt.
terratrix said:
If it is stuck on android logo after flashing kdZ, take out battery and press voldown+home+power button to hard reset
Sent from my LG-P500
Click to expand...
Click to collapse
Now this doesn't work anymore, it starts into the Emergency Mode each time.
terratrix said:
Just try using froyo, dont upgrade to gingerbread, and see the problem still persist.
Click to expand...
Click to collapse
I can not flash any rom on it, it stays in the Emergency Mode screen. It is the same thins I mentioned to Aspee above.
Is my phone bricked?!
Now what?

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My phone was acting wack so I decided to reboot and all of a sudden I saw the same screen that you are experiencing, but I just battery pulled and everything went back to normal. I have yet to experience this yet again though. (Running 6.5.7? CM7/Franco's kernel v19.?) Happened a while ago don't remember versions. I know I'm not much help but just saying I got this problem as well .

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lmihaila said:
What is supposed to be the correct version? I tried these rom's: V10A_00.kdz, V10B_00.kdz, V10E_00.kdz, V20B_00.kdz with KDZ Updater in all possible combinations and got the error "Upgrade error WParam:100. LParam:502" at each attempt.
Now this doesn't work anymore, it starts into the Emergency Mode each time.
I can not flash any rom on it, it stays in the Emergency Mode screen. It is the same thins I mentioned to Aspee above.
Is my phone bricked?!
Now what?
Click to expand...
Click to collapse
if you have emergency mode theres always a chance your phone flash by kdz delete all drivers follow the tutorial on kdz and install the drives they provide and try more then one time because when hi the 1 and last time hi use lg mobile updater to update my phone it stop in midlle and hi was stuck in emergency mode,i tried a lot of times some times windows dont detect my phone others it do but kdz dont i dont count but only several times of tryng the kdz works...
but emergency mode random i never read or see in my phone if you get it work on froyo or gingerbrad and that still happens hi think you should go to warranty and say that in a midle of update byLG software your phone stay that way they will fix it....

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Reminder: my phone boots to Emergency Mode after you power it off. While in emergency mode, if you unplug the battery it will boot the same way. If you leave the battery out for more than aprox 15 min, it will bot the OS it has written on it. Why??
After more an more hours spent on it I can conclude to this: my phone is to be seen by Windows only in emergency mode. I was able to flash it with KDZ while in emergency mode but with errors (Upgrage error: Wparam:100 LParam:6).
I was able also to flash it once with LGMDP but it stayed in the emergency mode screen and didn't rebooted itself, so again with an error.
I flashed it with both V10B and V20G and it behaves the same: while in Android, it isn't seen by Windows (with or without USB debugging) and if you reboot, it boots to Emergency Mode. Why??

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it´the first time hi read something similar but if you cant or if you have a chance to try in other pc do it but if you cant leave that way take to lg center service and tell them that was making oficial update from their program and phone stuck like that they will fix it for free i dont now how to help you

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I tried to connect the phone on three different machines, two Windows Seven and one XP. On XP I had the most success with flashing the phone.

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sir lmihaila, i have the same problem. exactly the same. been following this thread since you posted it, still no solutions, got this phone cheap from a friend, it was on LG stock rom, not sure what he did on it, but it already was doing the Emergency mode.
i update a month ago to CM7, tried different kernels and roms, it was still happening on all of them, was about to try kdz, but then i saw your post saying it didnt work..
so until we found a solution, i guess we never turn phone off, or if it did, leave battery out, mine works out of Emergency mode after 5 mins of battery out.

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bajie23, I'm glad you posted.
Indeed there is no solution yet, but I did some progress today. I played with the phone with it's battery unlugged and plugged his power adapter.
On a normal P500 the LG logo would appear and it would tell you to put the back cover and battery back. On mine, guess what, the emergency screen appeared.
But with a little knack, I pressed vol down+home+power and plugged the power adapter at the same time and the LG logo appeared as at a normal P500.
Then I inserted the battery, the device showed another wired attention triangle and Android System Recovery logo popped up, then I pressed Home and the Android System Recovery menu appeared. See pictures:
http://imageshack.us/photo/my-images/846/20110915230511.jpg/
http://imageshack.us/photo/my-images/16/20110915233836.jpg/
I could move trough the items in there with vol up - vol down but I couldn't press OK because none of LG P500 button did anything regarding this. I prepared even a new ROM on the SD card, renamed it to update.zip like in the Android System Recovery menu, but in vain because I cannot validate an action.
I exited this mode by unplugging the battery and power adapter,
I tried once again to enter Android System Recovery but I couldn't pass over the emergency screen anymore.
Just for the record, when you shake your phone do you also hear a little piece of something moving in the upper part of the device, right behind the earpiece? Does your handset has dropped marks? Has it ever been dropped, hit?
On my friend's functional P500 this noise isn't heard.
LS: bajie23, you said you tried different kernels and roms, how did you flashed them?

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that was my first post. registered here just for this issue.
no moving parts inside, haven't dropped phone yet, no damage showing it has been..
i used clockworkmod recovery to flash - try to google it, there are tutorials, but i cant post links yet on this forum.
i installed recovery mode using "rom manager v4.3.1.3" app..
it simply instals recovery mode on start up. you can go to it by holding volDown+home+power. then vol up and down to navigate, menu button to select.
you can instal. zip from your sd using recovery mode.
problem is with our phone, booting in recovery mode gets you to that F&*%In "Emergency mode!" screen. you need to keep battery detached for 3-5 mins, put battery back then hold volDown+home+power, do not let go until the recovery screen appears.
you can instal kernels and roms using recovery mode, there are options to wipe the cache and everything, tried all of them, but guess what? still F^&*% "Emergency mode"
looks like our problem is deeper than the start up..
*next thing i will try is to revert back to original rom, try to unroot, and see if it helps, even though it doesn't appear to be on the rom or kernel.. then i'll try your step to see if i can get partition table error as well..
**i remember seeing on a site saying Emergency mode is like a test mode for lg that they use to flash..

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Hi folks,
I have a Optimus One in the same condition. I tried to update Android to Gingerbread using the LG software and now it's pretty much always in "Emergency mode". I'didn't find any way to flash it again even with the stock rom. It seems that the usb port is not working correctly...
I'm using this procedure to let my P500 boot in "normal" way, and so far it seems to be working:
1) while the O1 is in Emergency mode, and the battery is almost fully charged, connect the charger a few minutes, let's say, 3 -5 min.
2) after that, remove the charger plug AND the battery
3) replace the battery on the phone
4) press the power button for 1-2 sec.
The phone should boot normally.
This procedure doesn't solve the "emergency mode" issue, but at least makes the phone usable.
Update: this procedure isn't working now!

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I got this problem, too.
Bought LG P500 on 12nd november, updated to GB 2.3.3, no problems for 20 days.
Then trying to connect to PC I notice that it couldn't see it, nor SD and the phone, too.
After connecting to USB if trying to reboot the device it goes into emergency mode.
After pulling off the battery for 5 minutes it reboot normally but it is still not seen by the Pc.
After removing the battery and booting normally if I try to reeboot again in goes normally.
So I suppose that there is something conflictting connecting to usb that avoid to boot until memory cleared (battery removed).
I sent the device to LG, yesterday, hope they solve the problem, usb issue?
What about you?

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partition table error is due to missing of partition.mbn file during selection of files to flash.
to install custom recovery you can follow http://forum.xda-developers.com/showthread.php?t=1318750 (partition file is included here use it if u want for some other purpose, it will be same for p500/optimus one as far as i know)
then flash rom from recovery follow http://forum.xda-developers.com/showthread.php?t=1309744
And if you are stuck at boot logo after flashing rom then factoryreset/format from recovery.
aFTER booting into rom if you see no gsm signal then upgrade baseband using http://forum.xda-developers.com/showthread.php?t=1217504
or
flash any other stock rom http://forum.xda-developers.com/showthread.php?p=19006040#post19006040
or
http://forum.xda-developers.com/showthread.php?t=1324105

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mak.3736 said:
partition table error is due to missing of partition.mbn file during selection of files to flash.
to install custom recovery you can follow http://forum.xda-developers.com/showthread.php?t=1318750 (partition file is included here use it if u want for some other purpose, it will be same for p500/optimus one as far as i know)
then flash rom from recovery follow http://forum.xda-developers.com/showthread.php?t=1309744
And if you are stuck at boot logo after flashing rom then factoryreset/format from recovery.
aFTER booting into rom if you see no gsm signal then upgrade baseband using http://forum.xda-developers.com/showthread.php?t=1217504
or
flash any other stock rom http://forum.xda-developers.com/showthread.php?p=19006040#post19006040
or
http://forum.xda-developers.com/showthread.php?t=1324105
Click to expand...
Click to collapse
I had this problem (not the partition table error) not after a flashing but after 20 days past the flashing, before everything was well.
What can be happened?

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I realized that there is something wrong with some LG500 motherboards, regarding USB connections. I too tried to flash the phone using LGMDP but I always got the partition table error. My phone, either in Emergency or in normal mode, is always recognized by the PC thru the USB, but when it starts to communicate it locks ... I cannot flash anymore, and actually it seems that USB port is useless.
I know that there are some special cables, apparently suitable for LG500 too, that can set the device in "download" (emergency?) mode, they use a 130k resistor somehow. If this is real, probably some motherboards are faulty, putting randomly the device in emergency mode, even without the mentioned cable. Pullup/pulldown resistor missing on MB? At first attempt to communicate, the USB controller of the phone locks, probably getting an undefined state. This is my impression.
Since my phone is still under warranty I settled to bring the phone to LG repair service...