Develop Bugs

[Q] No Wifi After LCD Replacement

Hi guys,
I recently dropped my phone on concrete, resulting in a nasty crack across the screen. Last night I received the new LCD/Digitizer and went ahead and replaced the screen (I opted to replace the LCD as well due to the copious amounts of glue used between the two parts). After many curse words were shared, I put it back together again and everything works perfectly... except Wifi.
I was wondering if anyone has had a similar issue, and where I should start looking to fix this? I took the cover off again to check both white (wifi?) cable and black (bluetooth?) cables, and both were connected as they should be.
Any help would be very much appreciated!
Tim

Go back through and check every wire and hook up. That's all you can do.
- hit my thanks button if i helped you -

hukel56 said:
Go back through and check every wire and hook up. That's all you can do.
- hit my thanks button if i helped you -
Click to expand...
Click to collapse
Yeah, thanks for the reply. I went through it on Saturday very carefully looking for any wire or contact that was loose and unfortunately everything was correctly attached. I did notice that the bluetooth and wifi wire plugs on the lower board were *very* close to each other, so they may well have touched and caused a short. After checking everything over and reassembling the phone, wifi still didn't work I also checked bluetooth and that won't work either, so perhaps my suspicions about the wires contacting is correct.
Note to anyone else doing a repair on this phone: Be very careful that the wifi and bluetooth plugs don't touch each other. It's very easy for them to rotate around in their socket and contact each other. I'm not sure if this caused them to fail in my phone, but it could certainly be the reason why both no longer work.
Cheers

Did you seperate the wires...and did that work.

hukel56 said:
Did you seperate the wires...and did that work.
Click to expand...
Click to collapse
Yep, I separated the wires and still no luck :/
I also removed the wires just to see if it would at least turn allow me to turn on the wifi, but all it says is "error" in the wifi settings and I can't turn wifi on no matter what I try.

I have exact same problem: after LCD replacement wifi fails with ERROR. Also sometimes no reaction to POWER button - no power off menu neither LCD is off/on. Don`t expect any wires or so i could accidentally damage.

Solved
After dissasembling phone again i found that flex cable has not good connection to mainboard. I pressed connectors, felt some "click", reassembled phone and after booting everything is ok:
wifi, bt, volume buttons, leds while charging operating well. Attaching picture. The connectors are located right under sim card and micro sd card slots, you have to remove full mainboard and flex cable to fix that. Cheers!

juzis28 said:
After dissasembling phone again i found that flex cable has not good connection to mainboard. I pressed connectors, felt some "click", reassembled phone and after booting everything is ok:
wifi, bt, volume buttons, leds while charging operating well. Attaching picture. The connectors are located right under sim card and micro sd card slots, you have to remove full mainboard and flex cable to fix that. Cheers!
Click to expand...
Click to collapse
That's really interesting. Thanks for the info. It's odd that the phone even functions if the flex cable might be loose. I may have a look and see if this is the problem too when I get a chance.

Yes, phone operate, but really weird behavior - some functions worked, some not, sometimes no reaction to power on button and so on. Hope this helps someone.

juzis28 said:
Yes, phone operate, but really weird behavior - some functions worked, some not, sometimes no reaction to power on button and so on. Hope this helps someone.
Click to expand...
Click to collapse
Hmm. I wonder if my issue is the same. I have experienced absolutely no odd behaviour other than wifi + bluetooth not working. Everything else works as it used to. GPS actually seems to work better haha. There are two flex cables so perhaps one of them does those two things.

TimHawker said:
Hmm. I wonder if my issue is the same. I have experienced absolutely no odd behaviour other than wifi + bluetooth not working. Everything else works as it used to. GPS actually seems to work better haha. There are two flex cables so perhaps one of them does those two things.
Click to expand...
Click to collapse
If you haven`t found any other damage: wires, pcb, then most probably your issue is related to exact flex cable. Yes, here are two contacts where flex cable connects to m/b, its clearly seen on photos i attached. My problem was both flex cables become loose...

You're a real man. I would have paid someone to fix my screen.

DIY makes you a real man? lol
- sent from a flux in space -

juzis28 said:
After dissasembling phone again i found that flex cable has not good connection to mainboard. I pressed connectors, felt some "click", reassembled phone and after booting everything is ok:
wifi, bt, volume buttons, leds while charging operating well. Attaching picture. The connectors are located right under sim card and micro sd card slots, you have to remove full mainboard and flex cable to fix that. Cheers!
Click to expand...
Click to collapse
My WiFi (and Volume Keys) stopped working after I dropped my phone.
After reading your solution I removed the SIM/SD-Cover and just by pressing from outside, the cable snapped in.
No disassembling, not even a reboot! My DHD works like on it's first day!
Thanks!

[Q] "Destroyed" volume flex!

Guys, my beloved galaxy nexus, had a power button problem. I opened up the phone, cleaned up the power but... I didn't figured out that the volume button was soldered to the mainboard. I just forced it and then noticed the sh*t I made. I think the power contacts we're taken apart with the solder.
So, if I send my phone to the Samsung Technical Assistance, there is still hope that it will be fixed or I f**** up my volume button forever?
I'm should never, EVER, open up this phone. I'm feeling a total crap right now.

I just ordered an electronics solder kit and a new flex cable (these are like $5). Going to try to fix it myself.

zmattmanz said:
I just ordered an electronics solder kit and a new flex cable (these are like $5). Going to try to fix it myself.
Click to expand...
Click to collapse
Hey, did you manage to fix it? i also accidentilly pulled the volume flex cable off the main board when changing my USB charging port. i tried sticking the cable back on with sellotape, obviously didnt work!!
i'd appreciate if you can update with your attempt

dcsworld said:
Hey, did you manage to fix it? i also accidentilly pulled the volume flex cable off the main board when changing my USB charging port. i tried sticking the cable back on with sellotape, obviously didnt work!!
i'd appreciate if you can update with your attempt
Click to expand...
Click to collapse
Well, I fixed half of it. The down volume button works but the top does not, so I will make another attempt at this week or next. First, these connections are super small -- I didn't have a set of helping hands or magnifying glass to see the connections as well as I should. Second, I'm pretty sure my solder was too thick -- it has to be a pretty small diameter.
I'll probably be able to fix it after my helping hands, flux and small solder arrive. Try it if your handy. I had never solder before and now realize I should have warmed the connection then apply the solder (vs. doing both at the same time).

zmattmanz said:
Well, I fixed half of it. The down volume button works but the top does not, so I will make another attempt at this week or next. First, these connections are super small -- I didn't have a set of helping hands or magnifying glass to see the connections as well as I should. Second, I'm pretty sure my solder was too thick -- it has to be a pretty small diameter.
I'll probably be able to fix it after my helping hands, flux and small solder arrive. Try it if your handy. I had never solder before and now realize I should have warmed the connection then apply the solder (vs. doing both at the same time).
Click to expand...
Click to collapse
i tried and failed. i too got the volume down button to work, but then went back in to try fixing the volume up button, ended up damaging the whole area, melted all the soldering points and none of the solder is sticking anymore. My first time soldering too, was worth a try!

dcsworld said:
i tried and failed. i too got the volume down button to work, but then went back in to try fixing the volume up button, ended up damaging the whole area, melted all the soldering points and none of the solder is sticking anymore. My first time soldering too, was worth a try!
Click to expand...
Click to collapse
Ah glad to hear I'm not the only one. I'm not sure why the volume up key connection is difficult to repair. It's pretty usable -- just vol down and then turn up the volume with the slider.

No sound after battery replacement

Hi
Month ago i replaced battery and since then i have no rear speaker sound. I've tried to fix it by reopening and looking where i didnt connect the cable or something but i cant find the problem. Can anyone tell me where are the cables for speaker because i didnt found nothing on google...

HOX rear speaker
foxxx46 said:
Hi
Month ago i replaced battery and since then i have no rear speaker sound. I've tried to fix it by reopening and looking where i didnt connect the cable or something but i cant find the problem. Can anyone tell me where are the cables for speaker because i didnt found nothing on google...
Click to expand...
Click to collapse
The rear speaker on the HOX sits in the bottom of the rear shell and has two gold coloured spring pins that push up against the mainboard. I have come across the problem when fixing them that the pins get pushed down so they don't contact the board, or can be easily broken off if bent to far. Try bending pins up so the tips sit about 1-1.5mm above the speaker housing. hopefully the picture I've attached shows the pins clearly enough. If this fails to work try replacing the speaker, they are fairly cheap if this doesnt fix the problem you may have a hardware/software fault but try the easy stuff first.

okhughes said:
The rear speaker on the HOX sits in the bottom of the rear shell and has two gold coloured spring pins that push up against the mainboard. I have come across the problem when fixing them that the pins get pushed down so they don't contact the board, or can be easily broken off if bent to far. Try bending pins up so the tips sit about 1-1.5mm above the speaker housing. hopefully the picture I've attached shows the pins clearly enough. If this fails to work try replacing the speaker, they are fairly cheap if this doesnt fix the problem you may have a hardware/software fault but try the easy stuff first.
Click to expand...
Click to collapse
I've bend the pins for 1-2mm and still no sound... i dont know what else to do... i wiped the pads with alcohol and still not working...

foxxx46 said:
I've bend the pins for 1-2mm and still no sound... i dont know what else to do... i wiped the pads with alcohol and still not working...
Click to expand...
Click to collapse
Was thinking about it again and pins do not sit on mainboard but rest on the flex cable that also houses the bottom led's for the home button etc.follow that back and make sure it is connected properly in its connector although it should be if your home button led's are working. Also check there are no small tears accross the flex cable,I have also come across tiny tears across one track before.

It some problema happened with me, but the volume button aren`t working... if someone know something about, help me! i don`t get boot or resset after drain all battery and not boot again!

petterson99 said:
It some problema happened with me, but the volume button aren`t working... if someone know something about, help me! i don`t get boot or resset after drain all battery and not boot again!
Click to expand...
Click to collapse
you didnt put the volume rocker up side down did you? Take the phone apart and check

SÜPERUSER said:
you didnt put the volume rocker up side down did you? Take the phone apart and check
Click to expand...
Click to collapse
I`ll check... tks

Replacing the charging port

Hey all,
I just replaced the charging port on my m8 and wanted to let people know it is straight forward. My port got corroded and was shorting out, melting the adapter and not charging the phone. I sent it in hoping for warranty, but the replacement quote was $400! (due to S-off they "had" to replace the entire motherboard). The phone has a separate pcb with the micro usb charge port and headphone input.
example:
http://www.witrigs.com/media/catalo...a71cb48e3d52cb890e76f9e6353/1/0/109063-01.jpg
To remove this board you need to do a few easy things:
1) disconnect the ribbon and remove the insulating tape (to reattach to new part)
2) unsnap the small white power cable
3) loosen the screw on the motherboard near the headphone input. This is clamping down the assembly a bit
tools required:
phillips 00
t5 torx bit
spudger/guitar picks
I would recommend prying the phone out of the frame starting from the bottom. I started from the top and bent the thin strip of aluminum above the sim slot when prying it out.
Also, you can pry the bracket/spring off the top of the old usb port to give the new one a tight fit if your replacement didnt come with it (like mine)
Lastly, just note that power button fell out as soon as I pried the frame apart from the guts. This made it a bit of a pain to reassemble - just be sure to reassemble with the top in first. That will keep the power button in place.
The replacement part cost me $30, so it was definitely worth it! phone now works great.

bookfast said:
Hey all,
I just replaced the charging port on my m8 and wanted to let people know it is straight forward. My port got corroded and was shorting out, melting the adapter and not charging the phone. I sent it in hoping for warranty, but the replacement quote was $400! (due to S-off they "had" to replace the entire motherboard). The phone has a separate pcb with the micro usb charge port and headphone input.
example:
http://www.witrigs.com/media/catalo...a71cb48e3d52cb890e76f9e6353/1/0/109063-01.jpg
To remove this board you need to do a few easy things:
1) disconnect the ribbon and remove the insulating tape (to reattach to new part)
2) unsnap the small white power cable
3) loosen the screw on the motherboard near the headphone input. This is clamping down the assembly a bit
tools required:
phillips 00
t5 torx bit
spudger/guitar picks
I would recommend prying the phone out of the frame starting from the bottom. I started from the top and bent the thin strip of aluminum above the sim slot when prying it out.
Also, you can pry the bracket/spring off the top of the old usb port to give the new one a tight fit if your replacement didnt come with it (like mine)
Lastly, just note that power button fell out as soon as I pried the frame apart from the guts. This made it a bit of a pain to reassemble - just be sure to reassemble with the top in first. That will keep the power button in place.
The replacement part cost me $30, so it was definitely worth it! phone now works great.
Click to expand...
Click to collapse
Hey there. Interesting to know that you replaced it all your self . Did you put everything back perfectly ? I mean the display being aligned properly to the body, the speaker grills being flushed with the body; ? Weird to ask, but did you damage anything while doing it all yourself ? Like the screen scratches, or something else ? Sorry, for asking these... Thanks in advance :good:

Tej XFire said:
Hey there. Interesting to know that you replaced it all your self . Did you put everything back perfectly ? I mean the display being aligned properly to the body, the speaker grills being flushed with the body; ? Weird to ask, but did you damage anything while doing it all yourself ? Like the screen scratches, or something else ? Sorry, for asking these... Thanks in advance :good:
Click to expand...
Click to collapse
I haven't re-glued the speaker covers back on yet so I dont know if they will be perfectly flush or not, although they still look flat so I think it will look good.
The only damage is a slight bend in the frame on the screen side of the sim tray slot. The metal is thin, and I pried against it to get the hardware out of the frame. That is why I recommended to start from the bottom when separating the two. Doing this should allow others to avoid this problem. It is slight, maybe 1/4mm gap where it used to be flush along the side of the screen above the sim tray.
Otherwise everything was smooth. The screen/frame etc are still mint.

bookfast said:
I haven't re-glued the speaker covers back on yet so I dont know if they will be perfectly flush or not, although they still look flat so I think it will look good.
The only damage is a slight bend in the frame on the screen side of the sim tray slot. The metal is thin, and I pried against it to get the hardware out of the frame. That is why I recommended to start from the bottom when separating the two. Doing this should allow others to avoid this problem. It is slight, maybe 1/4mm gap where it used to be flush along the side of the screen above the sim tray.
Otherwise everything was smooth. The screen/frame etc are still mint.
Click to expand...
Click to collapse
Cool, you've done it like a pro then. :good: .Any picture describing the damage would be helpful, if you can provide. Is the display mint ? No scuffs/scratches on it ? But, my speaker grills were damaged onto the edges after the repair was carried out. Does yours show the same sign ? I don't mean the flatness of the grills, but the damage that should be done, while prying out the grills. A picture showing your damage would be helpful to me. I could do the same, if you insist. Thanks ! :good:

Mine is busted. But I cannot find the PCB. The link in the op is dead.
Any ideas?

http://www.witrigs.com/oem-charging-port-flex-for-htc-one-m8

bookfast said:
http://www.witrigs.com/oem-charging-port-flex-for-htc-one-m8
Click to expand...
Click to collapse
I actually got one off eBay for $17.21. Works perfectly.

Just wondering....
Sounds like you were able to avoid some steps in the teardown guide, if I recall it was damn near a total disassemble. Do you have a lot of experience with phones? I want to fix mine, but don't need a tedious project right now. If I repair mine I'd like to put a mini USB in place of the micro if possible, I've seen too many damaged micro usb to trust or like them. As for the speaker grills, if you're picky buy replacements, they're cheap.

microphone on charging port?
bookfast said:
Hey all,
I just replaced the charging port on my m8 and wanted to let people know it is straight forward. My port got corroded and was shorting out, melting the adapter and not charging the phone. I sent it in hoping for warranty, but the replacement quote was $400! (due to S-off they "had" to replace the entire motherboard). The phone has a separate pcb with the micro usb charge port and headphone input.
example:
link
To remove this board you need to do a few easy things:
1) disconnect the ribbon and remove the insulating tape (to reattach to new part)
2) unsnap the small white power cable
3) loosen the screw on the motherboard near the headphone input. This is clamping down the assembly a bit
tools required:
phillips 00
t5 torx bit
spudger/guitar picks
I would recommend prying the phone out of the frame starting from the bottom. I started from the top and bent the thin strip of aluminum above the sim slot when prying it out.
Also, you can pry the bracket/spring off the top of the old usb port to give the new one a tight fit if your replacement didnt come with it (like mine)
Lastly, just note that power button fell out as soon as I pried the frame apart from the guts. This made it a bit of a pain to reassemble - just be sure to reassemble with the top in first. That will keep the power button in place.
The replacement part cost me $30, so it was definitely worth it! phone now works great.
Click to expand...
Click to collapse
My HTC M8's main call microphone has stopped working, and through searches on Google it seems that perhaps that this mic (first mic, non-speakerphone mic) is built into the charging port. Is this the case? I cannot find anything that explicitly says this, and I'd love to get the phone back in working condition.

dm8233 said:
My HTC M8's main call microphone has stopped working, and through searches on Google it seems that perhaps that this mic (first mic, non-speakerphone mic) is built into the charging port. Is this the case? I cannot find anything that explicitly says this, and I'd love to get the phone back in working condition.
Click to expand...
Click to collapse
I too am also curious if the mic is on the usb part because my mic doesnt wrk when i make calls.
Will replacing the usb port fix the problem?

Harvey02 said:
I too am also curious if the mic is on the usb part because my mic doesnt wrk when i make calls.
Will replacing the usb port fix the problem?
Click to expand...
Click to collapse
I called HTC, the mic is on the USB port, although you should make sure that it's not a software issue first. There are several threads on the internet easily found through Google which discuss doing a factory reset to resolve this if it turns out to be a software problem.

Thanks for your reply. I did a factory reset when I got the phone but it still doesn't work. Does that mean it's not a software problem and that if I replace the usb it should work?

Harvey02 said:
Thanks for your reply. I did a factory reset when I got the phone but it still doesn't work. Does that mean it's not a software problem and that if I replace the usb it should work?
Click to expand...
Click to collapse
I would think so, yes.

Thanks! Do you know of any online source confirming that?

Harvey02 said:
Thanks! Do you know of any online source confirming that?
Click to expand...
Click to collapse
No, but from what I've studied about it, it should work. Feel free to contact HTC, they actually have a live chat available somewhere on their website. Good luck to you.

Very interesting, I contacted htc and we went through diagnostics together and the rep said that I have to send it in. I asked him if the mic was on the usb assembly and he said that it wasn't and rather it was on the motherboard, and I clarified that we were talking about the primary mic which is located near the usb port. Confusing bec everywhere I saw online said that the mic is on the usb assembly. Go figure!

Harvey02 said:
Very interesting, I contacted htc and we went through diagnostics together and the rep said that I have to send it in. I asked him if the mic was on the usb assembly and he said that it wasn't and rather it was on the motherboard, and I clarified that we were talking about the primary mic which is located near the usb port. Confusing bec everywhere I saw online said that the mic is on the usb assembly. Go figure!
Click to expand...
Click to collapse
What did you end up doing? Did you discover if it was on the motherboard or the part with the USB port? I've waited a while to repair mine for other reasons, and I am now prepared to fix it. Any information would be helpful.

Just a few notes on my own experience.
I replaced the screen in my friend's M8 a few months ago. Seemed like everything went ok, except after I got done, the mic didn't work anymore. This is strange because it worked fine before, and all I did was remove/replace the circuit board in the process (yes, the small one at the bottom with the uUSB port). However, the upper rear microphone was still working I believe, because people on the other end of the line could still hear if the phone was put into speakerphone mode. I don't know why it would stop working all of a sudden.... Ran the HTC audio test using *#*#3424*#* to confirm main mic wasn't working and that the aux rear mic was.
Fast forward to this week, with my own M8. The uUSB connector was going bad, and I was having trouble charging, so I figured it was time to replace that circuit board. Ordered a new one and replaced, but when I got it back together, the USB port was fine of course, but my mic wasn't working now, just like my friends! On top of that, the headphone jack didn't work at all. Most likely the "cable inserted" signal wasn't getting back up to the motherboard, but didn't check. So pissed off. Also, the new board I got didn't have the bottom left RF connector/circuitry populated. Thinking from research that it might be for the GPS? I should have tested when the board was in there, but didn't. Fixed a bad solder joint on the original board's uUSB connector, which helped, but still charging is a bit messed up. I'd rather have a working mic and headphone jack and have to play with the cable to get to charge for a while until I get another board (from another supplier, jerks).
Yes, the mic is the small chip on the very left side of the board. It has a hole underneath the chip, going through the board and to the front face to receive the acoustics.
I don't know why the mic not working is so common after an HTC One M8 tear down, as it seems many others are having the same issue. One theory I have is that pulling the circuit board from the motherboard while power is still applied (not unplugging the battery first) might be jacking the microphone somehow. Just a theory, but I'd recommend to be safe that anyone replacing the board should unplug the battery cable before replacing the USB/mic circuit board.

I'd just like to chime in to say that I've read about some people having problems with the mic not working after replacing the USB board. From what I understand, there are two different versions of it, and replacing it with the wrong one can cause that very issue. You should look into it.
EDIT: Source - http://www.witrigs.com/blog/htc-one-m8-audio-jack-not-work-after-charging-board-replacement/

Mic broken after USB repair
Old thread but I have the same problem. Replaced USB board and now my mic does not work. However I am pretty certain I did order the correct board (had 2x connectors for my Verizon HTC m8). And my microphone jack work great which others indicate is often broken along with the mic. Anyone have any workarounds?

[Q] Power button not working.

Hello all,
I recently replaced the battery on my Xperia ZL as it was showing signs of death . After replacement, the power button no longer functions. I want to note that the power button had previously given me issues as it has become harder to depress it to make it work. There is a good chance the power button was damaged when I replaced the battery.
Before I move forward in trying to repair the power button I am curious if there is a way to repurpose some of the other buttons, mainly the dedicated camera button, to take the power button's place. I tried conducting a search on this forum but did not find anything.
Thank you all for your help!

srawas89 said:
Hello all,
I recently replaced the battery on my Xperia ZL as it was showing signs of death . After replacement, the power button no longer functions. I want to note that the power button had previously given me issues as it has become harder to depress it to make it work. There is a good chance the power button was damaged when I replaced the battery.
Before I move forward in trying to repair the power button I am curious if there is a way to repurpose some of the other buttons, mainly the dedicated camera button, to take the power button's place. I tried conducting a search on this forum but did not find anything.
Thank you all for your help!
Click to expand...
Click to collapse
It is possible, but could be tricky... The power button on ZL is part of the flex cable (FPC Side Key, Part #1261-9757), together with the volume buttons and the IR transceiver. The camera button is part of a different flex (FPC Camera key PBA, Part #1265-3974). The good thing is that the buttons are micro-switches soldered to those flex cables, and not integral parts of them. So, rewiring them is relatively easy, but may not be a trivial task if you are not handy with microelectronics. Keep in mind that if you screw up, you may have to replace not one, but two parts (both side key and camera flexes). Give it a try, if you are an adventurous type, and have proper tools, but you may want to consider just replacing the flex. Here is one example where you can find it online. The photo also gives you a good idea of what those buttons actually look like.

Thank you for your reply. You mentioned that the power button and the volume buttons are on the same flex cable, would it be easier to repurpose one of the volume buttons instead? I do not want to reopen my phone again as the phone works fine now barring the power button issue.

srawas89 said:
Thank you for your reply. You mentioned that the power button and the volume buttons are on the same flex cable, would it be easier to repurpose one of the volume buttons instead? I do not want to reopen my phone again as the phone works fine now barring the power button issue.
Click to expand...
Click to collapse
Without looking closely at that flex, and understanding how the conductors are routed, it's impossible to tell... If I was doing it, it would make a little difference to me whether it's the same flex or different one, as long as I can solder a thin wire to a switch (button). But honestly, it doesn't seem to be worth the effort, since replacing the flex is not expensive. I know I would be able to do what you are contemplating, but if I had the same problem, I would just order the part. My second option would be to dig through my electronics scrap bin, and try to find a micro switch of a similar size to replace the power button...

kt-Froggy said:
Without looking closely at that flex, and understanding how the conductors are routed, it's impossible to tell... If I was doing it, it would make a little difference to me whether it's the same flex or different one, as long as I can solder a thin wire to a switch (button). But honestly, it doesn't seem to be worth the effort, since replacing the flex is not expensive. I know I would be able to do what you are contemplating, but if I had the same problem, I would just order the part. My second option would be to dig through my electronics scrap bin, and try to find a micro switch of a similar size to replace the power button...
Click to expand...
Click to collapse
So the only way to repurpose a button would be to solder something onto the flex cable, there is no method via software to reconfigure a different button as the power button?

srawas89 said:
So the only way to repurpose a button would be to solder something onto the flex cable, there is no method via software to reconfigure a different button as the power button?
Click to expand...
Click to collapse
Jeez... Looks like I totally took it the wrong way, focusing on a hardware solution only. Talk about tunnel vision... The only software way to remap the buttons that comes to mind is to use Xposed Additions module. I haven't used it for a very long time, and can't tell you for sure what it can do to remap the power button, so you'll have to research it, or just try it out. But keep in mind that this remapping, if it works, will only be in effect after both Xposed framework and the module itself initialize.