Troubleshooting,need help w/power on/off not working - 8525, TyTN, MDA Vario II, JasJam ROM Development

After I turn device off via power button, it does not turn back on , but all the normal LED's are still lit!.. as if the phone was still working. I then do a soft reset using SR hole, which goes through normal bootup,, and unit stays on until I power off..(edit.. After 5 minutes, without continually using it,it just turned itself off!) I can't power on without SR. Batteries have been checked OK, and show up fully charged,settings for screen are OK,,. When I telephone my device from an exterior line,, there is no ring on my device during that blackout process, so even though I see LED's,, in essence, my unit isn't really powered up? Well, hoping someone else has had this type of erie experience, that can help. Thanks,, can 3rd party software do this to a device?

It's a new year so try a new rom or do a hard reset first and if that doesent work then flash it with a different rom and install 3rd party app's one at a time to see if there is a conflici with software
Oh and Happy New Year and good luck and report back with your effort's and result's
The Reaper

Related

My universal is a brick!

Hello everyone, my first experience of upgrading the firmware is sadly failed and now my beloved m5000 is only a beautiful paperweight!!!
No key combination could start the bootloader nor soft or hard reset works.
When I connect it to mains charger, the right led goes red for few seconds and then goes off...
In the service manual I have read that this signal means hardware failure but because the fault is the consequence of a failed upgrade I don't thing that it is really broken.
I already tried to contact htc and orange for repairing but in Italy where I live it seems that the warranty isn't valid and services are very scarce.
Someone have an hint?
Thanks.
Try to do a hard reset, many manage to get that white screen.
Thank you for the suggestion but it doesn't work The phone is completely dead, except for the red led. Any key combination including hard reset simply doesn't work.
I suspect that the only way to resurrect it is to reflash using a jtag interface.
But unluckily I don't own the pinout!!!
take a look here: http://wiki.xda-developers.com/index.php?pagename=Instructions for those stuck on Boot Screen for instructions on how to use the mtty utility to bring your device "back to life"
There's additional information on the mtty utility in this thread: http://forum.xda-developers.com/showthread.php?t=259003
hope this helps
If you are on the bootloader menu...
Try to flash again a complete rom + extended rom + Radio
SOmetimes it can work again
sigh... thanks to everyone but I can't reach the bootloader menu: the uni is bricked!
My only hope is to find the jtag pinout...
Try holding down Light + power for at least 5sec. and while still pressing, do a soft reset.
If you dont go to BootLoader then try to increase the Hold down Light + Power some more.
This worked for me, could again get it active on usb and ran my original rom upgrade while it was in BootLoader mode.
If that dossent work, try the bootloader upgrade version at
http://wiki.xda-developers.com/inde...tion On How To Upgrade with Bootloader method
You can do the same with the two - - buttons, holding for more than 5sec. then soft reset. Should bring up the Reset with 0 or X to cancel.
But it just reverted to a brick every time for me with this.
BTW. do this with USB or Power Cable plugged in!!
another possibility is that your battery is low enough not to allow booting but is still able to light up the LED. it happened to me a few times that i was thinking it was completely gone and it was just low bat. remember that if you have a non booting device it may not even charge the battery anymore so you'd better ask a friend to lend you a charged one, just to be sure.
cheers!
Ill Buy The Brick!
au$200.00 in your paypal account upon a sale +50 to Australia.
Let me know...
Simon
Still Charging
I have 2 wizards and a universal... By mistake, i have tried to upgrade the G3 wizard but pluged the G4!!!!!...... So now i have abricked G4 wizard. Now when i plug the G4 it does NOTHING, it is completly dead, BUT is still charging the Battery!!!! I am sure of this because i have tested the battery in the other device.. So try the same on universal plug it in and wait a few hours it may charge the battery.
anyway, if you can't unbrick it, do me me know if u're selling it.
need some spare parts.
Suggestion
What you can also try is remove Activesync from your desktop, Restart your desktop, install Activesync again and connect your device.
It's word a try! Has something to with rapi.dll!
Cheers...
Leo
My failure...
Hello everyone, I've tried all yours suggestion one by one and step by step but without success.
My last chance to not consider this phone a complete loss is to sell it as spares/repair...
Does someone is interested?
P.S.: notwithstanding the phone is bricked it still charge the battery
Try holding the the two - softkeyes for longer/shorter time before you softreset while still holding them down.
Also try different intervals with the softbuttons while holding the Power + Light down, also with soft+Light & soft+power & power+light
all with different intervals.
Look closely at the screen after each try, to se if it goes to bootloader mode.
And remove SD card and Sim also.
I Hate Bootloader!
I have tried ALL of these power+light+reset suggestions and I STILL can't get into the damn bootloader menu! I just gave up and rip apart my JasJar every time I want to update it. For some reason the only way I can access this menu is by pulling the main battery and disconnecting the smaller(watch battery) one in the upper right hand corner and letting it sit for a couple of hours.
Come to think of it, when I use even the factory updates I don't even get a report on the update screen telling me what my current config is! So then I hit update anyway, the unit turns off, I lose my USB connection, it no longer charges, and I have to take the battery out. Almost like the PROGRAM can't even get it into the loader! This is probably how I learned to just yank the batteries when I want to upload.
Unless there is something different because I have an earlier model... I have no clue. Does the unit need to be running or something when I do this? I think this is a fairly elementary task but it just doesn't work. Has this happened to anyone else?
Yes, all my buttons are in working order = )
BTW after my last tear-down I have -
Bootloader: 1.01
Rom version: Ivan-2.60.00WWE
Rom date: 12/20/06
Radio version:1.14.00
ExtRom version: Modified
http://forum.xda-developers.com/showthread.php?t=247440&page=14 I think someone already suggested this, but just in case...
No chances
Well, today I've verified my battery and it works like a charm in the uni of a friend. Then the last possibility is gone.
Someone knows how to go ahead any further?

Just got my gsm nexus and I like it but.....

Last night I updated to the latest ics update so I'm on 4.0.4. I've noticed it shuts off by itself occasionally. Even now at work, phone is laying flat and it shut off once. Also this morning driving to work phone was on my dash and it shut off. Both times phone was in sleep mode and I didn't know it shut off completely until I tried to turn screen on with volume keys or power button. I would then of course have to hold down power button to start phone up again. I haven't rooted or anything , I'm stock. I've tried tapping the back by the battery to see if something was loose but nothing happened.
Maybe some of you guys have experienced the same. Will this go away when I start rooting and romming ,or do I have defective hardware?
So no-one? So far I looked online and someone mentioned putting paper under battery to hold it tighter against contacts? I'm trying that but not sure if it's making battery hotter. I'll see if that works.
Also called Google just in case I have to go through the returning process which I hope not to go through this is what they emailed me for my issue.
" Greetings and salutations,
Thank you for contacting Google. It was my pleasure assisting you today. Many issues can be resolved by performing a hard reset by removing the battery or by factory data resetting your device, but first I'd like you to try removing the battery, wiping it clean with lint free cloth, as well as the prongs that connect to the battery itself. Try this a few times, if it does not work this should. Be sure to backup any personal files you may have on the device.
To factory data reset your device, touch the Settings icon from your ‘Home’ or ‘All Apps’ screen, then select ‘Backup & reset’ under ‘Personal.’
If you're unable to get to your Settings menu, follow the steps below:
1. Power down your device 2. Press and hold both volume keys and the power button to enter Bootloader mode 3. Press the volume keys to cycle to the Recovery mode option 4. Press the power button to select Recovery mode 5. From the Recovery mode screen, press and hold the Power button then press the Volume up button. 6. Use the volume buttons to select wipe data/factory reset. 7. Select Yes -- delete all user data. 8. The factory data reset process will now start. Once its finished, select 'Reboot system now.
If for any reason you need to contact us again, please feel free to reply directly to this email or visit our help center at
http://support.google.com/googleplay/bin/request.py?contact_type=contact_policy& policy=hardware
Regards,
The Google Play Team"
I better root and try a Rom asap huh?
I'd say get a replacement for it while you still can.
yeah getting a replacement could be the wisest thing to do
altho if when you received it in 4.0.1 it wasnt randomly shutting then something might've gone wrong with the update so you can unlock your bootloader and flash some ROMs to see how that goes
I definitely want to try some roms before I replace it as I have some time under Samsung's waranty. I also want to gently pull the contacts out a bit with small pliers to see if it holds the battery better. I'll even clean the contacts.
Man I'm hoping it's software ...
SysAdmNj said:
I definitely want to try some roms before I replace it as I have some time under Samsung's waranty. I also want to gently pull the contacts out a bit with small pliers to see if it holds the battery better. I'll even clean the contacts.
Man I'm hoping it's software ...
Click to expand...
Click to collapse
Gently pull the contacts out? Wouldn't that void your warranty? I'd be careful with the hardware if I were you.
Unless your battery contacts on the phone are smashed/deformed, it is unlikely that the battery connection is being physical broken at the contacts. The battery fits fairly snug in the compartment and the contacts stay touching even when the battery is partially removed. Probably no benefit to placing a piece of paper in there. Also keep in mind your NFC is in the battery.
I am also using a "Yakju" device from Google Play. No similar issue on 4.0.4 stock or CM9. At least not this nightly build : )
I actually got the GSM nexus yesterday and I had the exact same problem. The phone powered itself off twice. Once right after I turned it on and again about two hours later. Both times it occurred when I was moving around with the phone.
I pulled the battery and popped it back in a few times and it hasn't happened since.
Sent from my Galaxy Nexus using Tapatalk 2
You guys are probably right. The battery does already feel snug in there.
As I'm reading through forums for my issue, I can't believe how many sgn users are experiencing the same thing I am, some even reboots. Alot of them think it's apps. Good chance I'll exchange for the another device with same issue. I'm starting to wonder if this is why Google dropped the price.
Can't wait to get home and mess with this more. Hopefully I can make it go away.
I had this same problem when I first got mine with random reboots an powering off by itself,after about 2 weeks the problem went away, don't ask me how it seem to magically go away by itself maybe because battery needed time to settle in with the charging process.
Sent from my Galaxy Nexus using xda premium
I'm happy to report, knock on wood, that after I factory reset the phone the problem seems to have gone away. Last night I used the toolkit to unlock bootloader and root, and I flashed cm9 nightly and all is good so far. My only problem now is I dont know which rom to try next
I definitely want something with led customizations like cm9 has, thats just so old school reminds me of a blackberry .
Any suggestions, I guess I can also ask elsewhere.
SysAdmNj said:
I definitely want something with led customizations like cm9 has, thats just so old school reminds me of a blackberry .
Any suggestions, I guess I can also ask elsewhere.
Click to expand...
Click to collapse
I use light flow. It also lets me customize both LED and audio notification per app
harveydent said:
I use light flow. It also lets me customize both LED and audio notification per app
Click to expand...
Click to collapse
I had light flow going when my phone would shut itself off. It doesnt include alot of the apps I use to customize so I'm not the biggest fan of it now. I think the cm9 led customizations is sufficient as it lets you add any of your apps regardless.
Aokp has more features and is most popular so you could try that. Then try paradigm rom. I done use light flow, I just have a few led colors from stock and its enough for me for now. Google voice green, handcent texts blue, and Gmail and calls white. All from the stock apps.
Black ice is good so far. So many different variations of aokp roms I guess, its hard to recommend the "best" one.

[Q] Help!! a100 Blackscreen

i have a a100 with the latest flexreaper rom installed and im stuck with a pretty serious issue:
a couple of days ago the tab was acting real slow and sluggish and getting bad battery life didnt think nothing of it so i just rebooted a couple times and left it alone . all was good untill the battery hit 10% and i plugged it up using the factory ac adapter. the next day (maybe 6-7 hours later) i went to turn it on and nothing no vibrate no screen flash nothing; other than the power button turning blue as i pressed it and it would stay on for a couple hours but still no other response from the tablet.
im at my wits end on what could be wrong and now i got my wife with her foot on my neck till i get it fixed. can anyone help me?
ive tried to do a hard reset with the reset button tried to boot into recovery /bootloader no dice
(also my home button flashed a couple time i pressed the power button) dont know if its relevant but wanna get as much info out as possible
wondering if anyone can help me...
frenize said:
wondering if anyone can help me...
Click to expand...
Click to collapse
It may take awhile for someone to see this and form something to try, random bricking for no reason is rare, its almost always some error by the user. However have you attempted adb connection to it? Leave it powered off, connect to the PC you used to unlock the boot loader then power on. Does the PC make the USB connect sound? Does the Acer vibrate? Did the home key blink again?
It really sounds like your boot partition is wrecked which wouldn't normally happen outside of flashing. If boot loader is trash then it won't know what to do and just sit there. No recovery or anything else.
Tapatalked from my Galaxy S II.
pio_masaki said:
It may take awhile for someone to see this and form something to try, random bricking for no reason is rare, its almost always some error by the user. However have you attempted adb connection to it? Leave it powered off, connect to the PC you used to unlock the boot loader then power on. Does the PC make the USB connect sound? Does the Acer vibrate? Did the home key blink again?
It really sounds like your boot partition is wrecked which wouldn't normally happen outside of flashing. If boot loader is trash then it won't know what to do and just sit there. No recovery or anything else.
Tapatalked from my Galaxy S II.
Click to expand...
Click to collapse
it made something like the connect sound but instead of the regular duh doom sound it did a dadadoom (kinda hard to describe the sound) but it was faster than ive ever heard the connect sound before which is weird. the tab didnt vibrate and it seems the home button blinks when the tab is dead and needs recharged
frenize said:
it made something like the connect sound but instead of the regular duh doom sound it did a dadadoom (kinda hard to describe the sound) but it was faster than ive ever heard the connect sound before which is weird. the tab didnt vibrate and it seems the home button blinks when the tab is dead and needs recharged
Click to expand...
Click to collapse
Yeah I know that sound it means USB connected but error for some reason. Its been shown if this thing dies all the way down it wont read the battery correctly and probably needs to be sent in. Before that I personally would unplug it open it up and remove the battery for awhile, maybe an hour then put it back and plug it in. But thats me, not the advice I'm giving. If you have warantee on it use that.
The batteries on a lot of devices and laptops etc have something of a fail safe, if the voltage drops below a certain point it trips to prevent cell damage, however it renders the battery useless.
I haven't searched out much past that if a reset is possible by us, but it seems the pack is trash after or needs sent in.
Since this is a sealed unit you void warranty opening it (well unlocking the boot loader did too) so you can't send it in for repairs without paying for it.
I hope someone can jump in and help figure this out, and prove me wrong.
Tapatalked from my Galaxy S II.
Weird, This exact same thing happened to me. Used it in the morning and now after work it won't turn on. I had already tried disconnecting the battery, but hadn't thought to leave it disconnected for an hour. My tablet has been running the leaked ICS since it came out and The last factory reset it had was about a month ago. It was working fine up until this. The power button seems to be responding correctly, the issue is that after the LEDs light up, there is no vibration or display. I hope someone can help us with this issue.
EDIT:
It won't connect in ADB mode. It will only appear on my computer as an APX device and since there is no vibration I am unable to boot into fastboot. Any help or suggestions? All the threads I have found have involved booting into fastboot.
i am also having this problem. i set ti backup last night to save to box i turned it on this morning it.worked set it on the charger came back to a frozen screen. I turned it off now just a black screen it turns on or the home button dose but nothing comes up on the screen
same thing here.
max69power said:
i am also having this problem. i set ti backup last night to save to box i turned it on this morning it.worked set it on the charger came back to a frozen screen. I turned it off now just a black screen it turns on or the home button dose but nothing comes up on the screen
Click to expand...
Click to collapse
I have been using ICS the leaked one, and last night I was goint to check my email and it did not turn on, I though the battery died. I plugged to the charger and this morning I tried to turning it on but it failed. I did the reset pin but nothing. I connected to the computer and it was recognized as a APX device and installed a driver ACER Picasso USB recover but i cant access anything. I am a nob. Thanks
A100 blackscreen
i am also having this problem. last night. just a black screen it turns on or the home button dose but nothing comes up on the screen. :crying: Help!!!!!!
Has anyone tried holding the power button for a while? Laptops do this too, if someone felt ventures, try taking the battery out and hold the power button. No promises, might work.
sent from my ICONia
same here
Having the exactly same issue, here...
I also tried to hit the hardware reset button and it does not help.
If the screen is blank while powered on its in failsafe mode, in other words is bricked, has to go to Acer.
Tapatalked from my Galaxy S II.
This just happened to me a few weeks ago as well. If you are still under warranty send it in to Acer, thats what I did. I just got an email saying they had fixed it and were sending it back for free!!
At the time I was on the 9/02 JB build. I wonder if this issue is caused by faulty hardware or if it is an issue that was made by rooting and unlocking it? I don't know enough about this stuff to answer that though, but it does make me think whether I should root/unlock it when I get it back or leave it stock.
Also thanks Pio_masaki for helping me a few weeks back wasn't sure if I was even going to send it in until you said they most likely won't be able to tell.
I highly doubt they even CARE when sending these in. They will void for physical damage most likely.
tshm55 said:
Having the exactly same issue, here...
I also tried to hit the hardware reset button and it does not help.
Click to expand...
Click to collapse
Ohmygod,
Same here, but it's 3 years ago. Sorry for digging the topic. Still no hope? I still keep the tablet and have just buy another refurbished mainboard to replace but still no vibrate and blacksreen still there.

Lumia 900 just died... like totally dead!

...and won't turn on. Totally non-responsive. It's barely 2 months old. I was browsing on it, and battery level was about 75% (3/4 charged). Connected to home WiFi. Now it's not responding at all - power button doesn't do anything. I have connected it to a power source; typically this powers on the phone even if it's off - nothing so far. Took out the SIM, and tried that too. No dice. I have the June 6th update installed.
Any one experienced something like this? Any thoughts? Any advice?
dhafiz said:
...and won't turn on. Totally non-responsive. It's barely 2 months old. I was browsing on it, and battery level was about 75% (3/4 charged). Connected to home WiFi. Now it's not responding at all - power button doesn't do anything. I have connected it to a power source; typically this powers on the phone even if it's off - nothing so far. Took out the SIM, and tried that too. No dice. I have the June 6th update installed.
Any one experienced something like this? Any thoughts? Any advice?
Click to expand...
Click to collapse
Did u try a hard reset?
1. plug into original nokia USB adapter and cable. leave connected for up to 1 minute. If nothing then,
2. as previous poster stated, do a forced soft reset holding down the power button for about 10 seconds.
3. try hard reset -- hold down volume down + camera key, then press power down for 2-3 seconds.
Good luck
Would you try something a little un-orthodox? It may sound strange, but before you go and wipe all your data from your device with a reset try this:
Take your device, put it in a nylon/plastic bag (like those you put your sandwich in) and seal the bag. Now put the bag with your device into the freezer (YES! that thing in your kitchen!) for 15-20 minutes.
After that, take your device out and try to turn it on.
This method worked for a similar problem which occurred with another Nokia device with a non-removable-battery, the N8...
How to perform a soft reset http://www.wpcentral.com/tip-how-soft-reset-nokia-lumia-800-lumia-900
Thanks to everyone who replied. I tried the key-combinations to perform a reset. Did not work. Used the Nokia charger and left it plugged in, no change. Even tried the freezer-bag advice... nada. Phone was truly dead, from a 100% running state. Extremely weird. I've been in touch with Nokia USA and would have taken it to the store on Monday morning.
HOWEVER - out of nowhere, totally randomly, it turned itself back on at some point. I had it on my bed-stand, and was in the other room when I heard it ring. Ran over, and sure enough - it was alive, well and performing like nothing had happened.
No idea what (if any) of the methods I tried worked, but it resuscitated itself.
dhafiz said:
Thanks to everyone who replied. I tried the key-combinations to perform a reset. Did not work. Used the Nokia charger and left it plugged in, no change. Even tried the freezer-bag advice... nada. Phone was truly dead, from a 100% running state. Extremely weird. I've been in touch with Nokia USA and would have taken it to the store on Monday morning.
HOWEVER - out of nowhere, totally randomly, it turned itself back on at some point. I had it on my bed-stand, and was in the other room when I heard it ring. Ran over, and sure enough - it was alive, well and performing like nothing had happened.
No idea what (if any) of the methods I tried worked, but it resuscitated itself.
Click to expand...
Click to collapse
LOL! You probably got the Lumia 900P - the Phoenix version! :laugh:
To tell you the truth, yesterday I had a strange "almost dead Lumia 900" moment myself! I was on my way from work to the bus station, while listening to music on an internet radio station (I'm using the "Tunein Radio" app) when I decided to change the station I was listening to, and when I switched to the other station the screen became entirely black and all I could see is the station's Stop/Favorite/Bookmark buttons.
Anything I clicked on did absolutely nothing... At one point the screen became completely blank but the device was still working (I knew it was still on because I could hear the static 'clicking' sound in my headphones when I connected them to the device), so I just tried pressing and holding the power button for 10 seconds, and the device finally turned itself off...
After turning it on again, everything was working as if nothing happened... Odd stuff...

[Q] Help - Glide crashes and restarts

I bought a Samsung Glide i927 phone last month in the US, i bought it unlocked as i am from argentine, and i wanted to use it with movistar.
Recently the phone started to crash a lot, by that i mean that the screen starts going white, with horizontal lines and pixels of different colors appearing, then just turn off or restarts itself, only to crash again as soon as it starts an then turns off.
When this happens i try to start the phone and select the shut down option myself to see if the next time it starts it doesnt crash. But sooner or later it happens again.
This problem its happening too often, and not while doing something in particular like running an app or something. Sometimes it crashes just by plugging it to the power adapter, it even shows the white screen with the lines instead of the charging battery image when i charge it while turned off. I have already try to fix it upgrading android or doing a factory reset, but that didnt work.
Anyone have any idea of how to resolve the problem, or if its a hardware malfunction that cant be fixed?
To make things more difficult, as i said earlier im from argentine, and i cant go to AT&T or Samsung to get it fixed or get a replacement. English is not my first language, so please forgive my orthographic mistakes.
Thanks
This really sounds like some hardware problem, but to be safe, learn how to use Odin and use it to revert your phone to completely stock condition (cleaner than factory reset).
Sent from Samsung Captivate Glide @ CM10.1.2
AndyYan said:
This really sounds like some hardware problem, but to be safe, learn how to use Odin and use it to revert your phone to completely stock condition (cleaner than factory reset).
Sent from Samsung Captivate Glide @ CM10.1.2
Click to expand...
Click to collapse
I tried to do that, but the first times when Odin try to reboot the phone it just freezes and i have to unplug it. After many tries it finally finished, but the phone keeps freezing and crashing.
The phone even crashes while turned of and conected to the power adapter.
Do you think that with LiteROM 0.9.0, that might fix this issues?
I've got reboots too, try to disable auto brighness
It helps for me
Sent from my SGH-I927 using xda app-developers app
Power button issue
I am having a similar problem. At first, it just happened on rare occasions. However, today, it started doing it repeatedly. The phone was unusable. I did some checking around, and it appears that the power buttons on Samsung phones are prone to sticking. Some people suggest you actually remove the battery and slam the power button against a table. I wasn't going to do that, because I could just see it doing even more damage. What I did instead was firmly tap the power button repeatedly. It seemed to unstick the power button and allow the phone to function again.
Another alternative is to have the power button replaced, but that might be a hassle.
First of all, sorry for my bad english.
I bought it on amazon a few days ago, I have the same problem...
I thing aznemesis is right, because my power buttom is very sensitive, in fact, some times, when I press the button smooth and fast, to turn off the display like, the typical menu appears as if I had pressed the button for much longer period. Which proves your theory. The problem is if I hit the button over a table and the button breaks here in Chile do not exist spares of the terminal
Well, I did. I couldn't stand the desire to do so. After nearly 18 hours, the terminal isn't rebooted again.
Panchon1978 said:
I bought a Samsung Glide i927 phone last month in the US, i bought it unlocked as i am from argentine, and i wanted to use it with movistar.
Recently the phone started to crash a lot, by that i mean that the screen starts going white, with horizontal lines and pixels of different colors appearing, then just turn off or restarts itself, only to crash again as soon as it starts an then turns off.
When this happens i try to start the phone and select the shut down option myself to see if the next time it starts it doesnt crash. But sooner or later it happens again.
This problem its happening too often, and not while doing something in particular like running an app or something. Sometimes it crashes just by plugging it to the power adapter, it even shows the white screen with the lines instead of the charging battery image when i charge it while turned off. I have already try to fix it upgrading android or doing a factory reset, but that didnt work.
Anyone have any idea of how to resolve the problem, or if its a hardware malfunction that cant be fixed?
To make things more difficult, as i said earlier im from argentine, and i cant go to AT&T or Samsung to get it fixed or get a replacement. English is not my first language, so please forgive my orthographic mistakes.
Thanks
Click to expand...
Click to collapse
The horizontal lines on the screen sound as if it is an overheating issue. What were you doing before your phone shut off? Are you using the factory charger?
cure found
take the battery out...blow on the power button with some compressed gas to get the dust out....then pour a drop of silicone based lubricant on the power button so that most of it gets in the gaps...then hit the power button a few times....haven't had any reboots since then

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