Develop Bugs

[Q] power button not working/always on

hi guys i have a real bad problem...woke up this morning and my desire wouldnt wake up when pressing the power button...screen turned on after i put the charger in but when the auto screen off turns the screen off i cant wake again until i attach the charger.also with a battery pull the phone turns off but then when i put the battery back in the phone automatically boots without touching the power button
thanks

bailz2506 said:
hi guys i have a real bad problem...woke up this morning and my desire wouldnt wake up when pressing the power button...screen turned on after i put the charger in but when the auto screen off turns the screen off i cant wake again until i attach the charger.also with a battery pull the phone turns off but then when i put the battery back in the phone automatically boots without touching the power button
thanks
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My money is on a hardware failure. Do you have a stock ROM ?

hey yea i went and unrooted and reinstalled my carriers stock ruu....still same problem.looks like taking it back to the shop for them to fix

Hey actually exactly one week ago my Desire started the same exact thing, and I could not find help anywhere. Best info I can find is that it might be moisture, but at least for me I don't think that is the case.
I ended up taking the whole phone apart (been taking stuff apart all my life, but i was still nervous) to clean it out since I've had dust in the screen for a while... I think I cleaned it out pretty well, but did not take the plastic tape off the button. This did not immediately help, but after playing with it for a while it now works most of the time, but is quite sensitive usually.. the button "presses" before it mechanically "clicks".
Anyway, If you were to become desperate enough to try this, I would recommend pulling that black plastic tape off the button when cleaning, then stick it back on. Good luck
I've been lusting after the Sensation anyway

yea im not into pulling stuff apart that i got no idea about...took it back still under warranty n its getting sent in for repair...now stuck with a piece of **** samsung omina icon....windows phone sucks the big one very hard...ill be going back and asking for at least an android as a loaner while its in for repair

ohh well that's good that it's still under warranty. I was actually using the camera at a beach during hurricane Irene and that night the power button went berserk.. continuously turning the screen on and off... before eventually just staying "pressed" all the time again. So maybe the moisture theory isn't all that far fetched in my case (I was at a beach the first time it happened, but never went near the water)
Currently trying to get a broken Desire on ebay to harvest for parts :/

Moisture - Htc Desire Power Button.
Hello,
I've met with that problem.
I've unscrewed the device, I've remove the black tape, and I've used a cotton swab to clear it.
But the problem was solved, but later withing the 24hrs, It's back to auto on/off without pressing the button.
I would like to know, Should I remove the yellow transparent tape on the button for cleaning?
Thanks.

Power Cycle

So after finally fixing all the other issues i had with my phone (broken screen, broken vibrate motor, broken speaker) i was finally at ease. It lasted for about a week with everything functioning until now the phone gods have again struck me down. This time i have what is referred to as a Power Cycle. Kind of like a boot-loop except the phone completely boots up into my homescreen then the power options menu pops up, and no matter if i click back or not, that **** is going to reboot on me. Its to a point where if i pop in the battery the phone auto boots. Here's the kicker though. If i take off the back case and just set it on the battery with an open back, it doesnt power cycle. But the power button on the case itself is not stuck as you may be thinking as i can depress it and the cover spring pushes it back. I've hard reset, even went back to complete stock (no root) and it still does it. the power button works (very sensitive) if you have no case on the back, but if that thing is on, it acts like the button is being pressed.
Any Ideas?

Sounds like the power button is stuck... Try taking the phone apart and cleaning the contacts. Then press the power button a few times to ensure it works like it is supposed to. Put everything back together, tighten the screws but don't torque them. Should not turn on after you put the battery back in, wait a few to make sure it doesn't. Then power it on and see how it goes.
Sent from my Slim E4GT using xda premium

still didnt work. i used some rubbing alcohol and a lint free cloth on it. the interesting thing is, when you take the case off, if you set your finger over where the button is (making no contact) it still registers that you are touching it. this is what i think is causing it to power cycle when the phone case is on, as it believes that it is being pressed when it isnt.

th3 game said:
the power button works (very sensitive) if you have no case on the back, but if that thing is on, it acts like the button is being pressed.
Any Ideas?
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Click to collapse
I had almost the exact same problem with my Epic Touch. Ended up being a bad power switch. How handy are you with a soldering iron? If you're pretty good, you can buy the switch for ~$10 and replace it yourself. (You can also try cleaning it - several tutorials here, and the "Captivate" phone seems to have the same switch and issues. Search both forums)
Several eBay sellers sell the switch you'll need.

Camera replacement killed it!

Hey XDA Community!
Recently put up a thread about the shoddy quality of the OneX in some places, basically the issue was that the battery was deteriorating, both cameras stopped working too, this phone has been kept in a case always too.
So i finally got my head around how they've situated the camera module, so i replaced it with a new one i bought from ebay.
After putting the phone back together i'm unable to get any signs of life from it, power button does nothing, plugging in microusb does nothing.
The phone is off, it wont power on.
Although you'd probably think i might have unhooked the battery my accident, this isnt the case. The connector from the battery is secured to the connector on the motherboard firmly, i even popped it off, put it back in and tried again to still get same results.
The only thing that's changed since i pulled the phone apart was the rear camera module swapped out for a new one, and that shiny sticker stuff that was on the battery was peeled off. Not sure what the issue is here, so open for suggestions!
Cheers guys

[Q] Power Button Failure

I had a weird thing happen. Earlier today I dropped my phone from approximately 18 inches onto a laminate surface. The phone was in a protective case. After I picked it up, the power button wouldn't work. The rest of the phone was fine. No scrathes on the case, no other types of hardware failure or signs of damage. I opened the phone up, removed the motherboard and inspected the entire system. Everything seemed perfect. I inspected the power button and there didn't seem to be an issue. I put everything back together, while paying close attention to make sure that all connections were secure. After reassembly there was still no change. So I have a couple of questions:
1. Can I jump the connection between the two power button connections (which I believe is how the power button itself normally activates the phone) to see if that's where the problem is so that I can establish if the power button is in fact the problem? Or will that short something out on the motherboard?
2. Has anyone had anything like this happen, or know of a place where the power button can be bought, etc... Any suggestons are appreciated! =)
Thanks!
Edit: I was able to find the connections to the power button flex cable. The two terminals were loose and I was able to pull them out a bit using a wooden tooth pick. I now have good contact and the power button is working perfectly. I recorded what I did and will post a video on YouTube in case someone ever has this happen to them. I don't know why an 18 inch fall would cause this type of issue, but oh well. Fixed is fixed.

Crack open M8 case and swap battery daily

Not really possible to do this if you wanna put the screws where they belong.
However I just noticed that the case can be removed pretty quick and pain free with just a thumbnail and a guitar pick as long a s you prop the top with the pick, and slide the strong thumbnail all along the non vol button side. I was surprised how easily the snaps popped and the side lifted up. After which it was easy to remove the glass and bulk innards of the m8.
...anyways, when I cracked one of my repair jobs open just now I found an entire ribbon from the motherboard not plugged in. The one on the upper left that come from under the motherboard and attaches at the sisterboard
Anyone know which this controls?
This phone was recieved as a "No power up, no charge" purchase.
Hoping for another quick fix here.
When that ribbon was partway plugged the vibrate bobin continuously went, then a satisfying end to oscillating bobin vibration when I got it in place.
So it clearly has plenty of battery. Yet still refused to turn on even after the 2 minute long press of power+vol up which is suggested throughout the world to solve no power up problems. Also tried the 20 sec power hold then short vol up push followed by 10-15 sec power + vol up hold. Nothing.
I had not plugged it at that time.
Both m8 I opened today were previously opened phones and both opened easily. Planning a usb port swap if I can't get this one to work.
Anyone got any other ideas on getting the battery working let me know.

Actually, to correct this, no guitar pick is needed at all now. I can pry all with my strong thumbnail. The thumbnail is only 1.5 mm. The top is the start point, get it up so it doesnt go back in, say 2mm from back case, then the non volume button side, then the vol side sliding both sides from top to bottom in turn, (you should be able to hear each snapping clip pop out, 4 per side, as you slide. Then the phone body will pop out of the case as easily as a samsung.

couple of videos
take apart the m8 with thumbnail (~5 min) https://www.youtube.com/watch?v=OxbLTptmkKo
replace USB Port without removing motherboard or sisterboard (~6 min) https://youtu.be/6mDh1FM_37k