The Windows 10 April 2018 update has arrived! Get the new Dell XPS 15, starting at $999.99
02-07-2018 04:42 AM
67 123
tools
  1. Gadworx's Avatar
    I think I know what the problem is:

    THE PROBLEM:
    I am on my second 8X and both have the problems described above in this forum. Basically, the phone goes to sleep, so it looks dead...screen blank without any LEDs on. Unfortunately it will never come out of this mode. It appears to be dead, but often if someone else calls the phone it rings instead of going straight to voicemail as expected. Thinking it is powered down, one puts it on a charger, but that does not appear to work. But it will eventually. If left on the charger for a random amount of time, it will revive and show that it has like 1% or 2% power. It will then charge up and return to normal usage. How long it has to be on the charger depends. My first phone I left it on for days (I had given up and went back to my old phone and was going to return the 8X), and after 5-6 days it came back alive! My current one will come back in hours instead of days.

    THE SUSPECTED CAUSE:
    The phone goes into sleep mode and a program or the O/S crashes by getting into an infinite loop or possibly an internal hardware interrupt continuously firing. In this loop, the CPU usage must be at or near 100%. This makes it unresponsive and appear dead. Depending on the crash/loop, the cell transmitter may still be working and is independently still connected to the cell network (so we appear to still be online to those that call us). So we plug the phone up thinking that it needs charged, but it doesn't. I assume that when it is connected to a charger the battery must be charging, but since the phone is looped into 100% CPU usage, it is using power slightly faster than the charger is charging the battery. So depending on how much charge is in the phone before the crash, the phone continues in this mode for a random amount of time until the phone battery actually reaches depletion (again because the charger cannot keep the battery charged faster than the loop is using energy). Depending on the starting battery power or the actually CPU usage (89% versus 95% versus 100% for example), the phone finally drain and shuts down and depowers. Since it is doing this already connected to the charger, it then powers back up when it has minimum power (shouldn't take long...maybe immediately at this point). At this point the phone will boot up normally and be back to normal.

    POSSIBLE SOLUTIONS OR FIXES:
    If the battery could be removed, removing the battery would work (I did this with my Android problems)--but I like the thinness of the 8X...like it better than any phone I have every had (I have had all the other platforms). So one way might be to NOT put the phone o a charger and let the phone drain faster so that it shuts down. The problem here is that you will never know when it actually shuts down, so one would have to plug it up periodically and see if the LED comes on--remember though if it is fully drained, it may have to actually charge for a bit before it reached minimum charge (maybe not though).

    Another thought would be to try to figure out why it may be in this crashed loop to start with. Others and myself have noticed it happens a lot when the phones are in our pockets. There is a feature that rings the phone louder when it thinks it is in our pocket. Maybe turn this feature off as maybe the method used to do this has a bug or something. Maybe a similar feature might be doing this. If it is not the O/S or the phone software itself, maybe it is a background task that is going crazy, so looking at these programs might be the problem. There are some problems with the WP O/S I believe so it could be in the O?S itself (hope not).

    If anyway can test these assumptions with me and post the results that would be cool. Unfortunately the only way to know if turning off features or background tasks work is by waiting a long time and not seeing the problem...argh! ...but got to start somewhere since HTC isn't fixing this anytime soon.

    Thanks all! I do not know if this is the problem or not, but it does fit the evidence quite well.

    --GAD
    07-18-2013 02:06 PM
  2. Coolknight1968's Avatar
    Trick. Use a iPad 10W charger if the battery seems dead, your 8X will revive quicker! Then once it is back on, use your regular charger.
    07-18-2013 05:24 PM
  3. Alen Murillo's Avatar
    thanks! you sabe MY PHONE and my $400 investment! what I used was my SONY PS VITA charger! its 5V-with-1500mA(1.5A)! when I plug it in suddenly revive! im in debt with U! One more cuestin... should I keep it chariging with my Vita charger or do I need to go back with my 5V-1A charger? thanks!
    08-22-2013 09:33 PM
  4. Awyais1's Avatar
    i bought my phone of ebay but its network provider is vodafone so do u guys think they will replace it HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    10-21-2013 07:30 AM
  5. aravind raj's Avatar
    Hi,
    I bought an HTC 8x Windows phone day b4 yesterday via an online store, While putting the phone into my pocket, I accidently pressed the power button and it asked for whether to swipe to switch off. I swipped it and gone... After that the mobile dint switch back ON . The screen displays nothing, the back, Windows, and search buttons do not light up, and the charging light fails to turn on when connected to either a wall socket. I have tried holding down the power button and volume-down button for 15-20 seconds, I have held down the power button for a whole minute, but it is not responding
    I searched HTC website and the support is available only frm 9am to 9pm... Waiting for that....

    Can anyone help me in suggesting doing some thing other than the power button+volume button...
    Or any one suggest the exact procedure in doing...

    Thanks in advance.
    rgds,
    aravind
    91 9895 505 404
    11-08-2013 12:30 PM
  6. ALEXANDRIA JAMES's Avatar
    this really helped me, I was panicking!! my phone is now back on!! yay thank you
    02-03-2014 04:00 PM
  7. Ibz Khan's Avatar
    Pressing Power button and down-volume rocker together for 10 seconds worked for me Alhamdolillah :) !
    05-03-2014 04:32 AM
  8. Haroon Ayaz's Avatar
    Mine htc is also not working.. and i have visited many shops here but there was nt a gd response from any of he shopkeeper .. if there is any solutiona bout this kindly inform me to .. htc service center are claiming that my phone is dead ;(
    05-13-2014 08:31 AM
  9. LeopardSurd's Avatar
    I purchased my 8X some months ago. Meanwhile I have a similar problem like those that are here described:
    "I put my phone on charging over the night. Morning, when I want to unplug it, the phone screen doesn't wake up if I press the power button. Strange enough, the led remains green even if the phone is unplugged from the charger".
    The solutions for these events:
    - long press (about 10-20 sec) on power button until the phone restart itself.

    These happened on WP8 and WP8.1 too. I hope this is just software related.
    Last edited by LeopardSurd; 05-31-2014 at 05:15 AM.
    05-31-2014 04:04 AM
  10. Mackenzie Feldt's Avatar
    I've had the 8x since October of last year and it's caused me nothing but problems. I've had 6 replacements due to manufacture issues. Mine currently won't turn on and before it shut off the LED lights were flashing green and red.
    08-24-2014 10:49 PM
  11. Bob Squires Jr's Avatar
    AT&T... Got the HTC Windows 8X phone. Had it for a few months. It would shut off, get real hot then when it felt like it, it would turn back on again with the battery being near fully discharged. I sent it back, got a refurb. Same thing. THREE TIMES I did this! Yes 3 of the same phones had this problem. But each time the warranty gets shorter. Now my 4th phone is doing it and of course, the warranty is out and I'm not eligible for another phone until June of 2015 which, as of this writing, is 4 months away. AT&T will not budge and HTC gives the run around. Nice customer service eh? I just hope this one can keep reviving until I can get a new phone.
    02-11-2015 10:22 PM
  12. Tommie Jnr Okine's Avatar
    I'm having the same problem and i need help, a.s.a.p !!
    02-16-2015 08:38 PM
  13. sediq mccook's Avatar
    Can anyone HELP me please I do like this cell a lot was on what's app this morning and it just turn off and won't come back on can anyone tell me what to do
    10-28-2015 05:21 PM
  14. sediq mccook's Avatar
    I'm having the same **** and am very upset too as on what's app and it just turn off and plan not to come back on. When I plug my charger in it indicate to me the red light blinkling but that it
    10-28-2015 06:07 PM
  15. Rotary12's Avatar
    I think the 8X is cursed. I dumped mine for a HTC One m8 with Windows 8.1. MUCH better phone and I will be able to update to Windows 10 when in comes out in the next month.
    10-28-2015 08:52 PM
  16. Gadworx's Avatar
    ACTUAL CAUSE AND SOLUTION
    -----------------------------------------------------
    As an engineer in a lab and a programmer as well, I once thought it was a specific problem. After having 3 of these (can get them cheap on eBay or Amazon)...I finally did the work to figure it out for sure. my first conclusion was close, but here it is...

    The cause of the problem seems to be the chip that the battery charger uses. This chip is in all phones and works outside of the O/S (so it is not actually a Windows problem). Due to the thinness of the phone, the phone flex and this chip either from a trace or some other cause puts the chip in a false state. For instance, this problem always happened when I put the phone in my pocket.

    The phone in this hardware state then thinks it is not charging. So step 1 in fixing it is to let the phone completely die (i.e. use up all its power)--BUT DO NOT LEAVE IT ON A CHARGER AS IT STILL MAY CHARGE IN TIS STATE AND NEVER POWER DOWN. Depending on the what the charge was in the phone when the problem started, it will discharge quick or a very long time.

    Once it is discharged, plug it back into the charger and it will revive. At first because it is totally dead, it will have to charge for a very short bit before it will boot up, but when it does it is good again! Why does this work? Because the battery chip needs to be rebooted and since it is directly connected to the battery, it will not reboot until it is completely drained of power. Of my three phones, this happened many times (as I let them just our of curiosity of the problem). Finally one of them got wet and died...ooops...unrelated to this problem.

    I tried this with Windows 8 and also 8.1...of course both worked as this problem is O/S independent. It is a hardware problem due to the thinness of the phone and like a speculate a thin trace as well. Now for a solution...

    I liked the thinness as it slipped in and out of my pocket easily. I just quit putting it in my jean's pocket. Finally I ordered an Otterbox for one of them and it was still thin enough to use in my pocket, but rigid enough not to flex--problem solved. With that phone with the Otterbox, I never had the problem again after having it all the time.
    10-29-2015 02:37 AM
  17. netvic8's Avatar
    hello the guy told u that the phone can't do anything again u tel hi to hold power button en vol yet he told u that it can't eve vibrate nor led when charging
    02-07-2018 04:42 AM
67 123

Similar Threads

  1. My Lumia won't turn on :(
    By kinslayer in forum Nokia Lumia 800
    Replies: 14
    Last Post: 02-02-2017, 11:48 AM
  2. phone won't turn on!
    By ScubaSteve1219 in forum Windows Phone 7
    Replies: 18
    Last Post: 11-25-2015, 09:09 AM
  3. Please NEED help Focus won't turn on!!
    By eddy9389 in forum Samsung Focus
    Replies: 1
    Last Post: 04-18-2012, 10:09 AM
  4. Focus will turn on to Samsung, but won't turn on
    By focus143 in forum Samsung Focus
    Replies: 2
    Last Post: 03-02-2012, 09:09 AM
  5. Samsung Focus won't turn on.
    By SeanR1221 in forum Samsung Focus
    Replies: 3
    Last Post: 10-23-2011, 10:14 AM
LINK TO POST COPIED TO CLIPBOARD