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i have htc one m8 and i have accidently drop it(with armour case) but somehow it do damage to my power button sometimes the power button when press, heard the click but its not work sometimes it like stuck or something, it keep appear power button menu multiples time how do i fixed it? and the volume button, need to press very hard to make volume adjustment

Haris Fitri, If the buttons have just started acting up since the drop, use the ifixit disassembly guide below, you can open up the device and see what is making the power/volume button not to work properly, could be dirty,dislodged from position/not seating properly or may need replaced from damage. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. HTC One (M8) Teardown https://flipsy.com/blog/14/05/How-To-Rephttps://www.ebay.ca/sch/i.html?_odkw=htc