Here is shortcut jumper ways to repair iphone 4 on/off key easly
By this way you can easly repair iphon 4 powers switch if on off flex is damaged and you don have that flex or you are unable to buy are somewhere these costly part are no available,billow picture will show the point of on/off key on motherboard,if you are technician then you can easly make jumper to repair broken on/off flex or on/off flex connector
this is power key positive point on main board for ground supply you can easly found on any corner of mother board.just check supply and make it happen.
NOTE – While this repair will fix the On/Off button, if you’re having issues with the noise buggy mic, proximity sensor esue,or ambient light sensor, so always take care while repair iphone specially if are you working on its motherboard,always use good quality disassembling tool and proper knowledge to check supply and using a hot soldering iron.
This will also helps you to turn on iphone when power key is broken,without replacing power key flex.
if your iphone power key is broken and your phones charging also not working ,this tricks will helps you alot in that case,easly short positive power point with ground and make your iphone alive again.
best of luck
!!!!!!!! for any query just comment here,we will feel Happy to help you !!!!!!
Many users are getting problem while flash micromax q338 mediatek phone dead after flash it with firmware
to avoide Dead After Flash problem always untick preloader before flash
some times problem is under hardware but after flash handset soft bricked and unable to recover again this is the main cause ,some times mismatch h/w.version will also affect specialy mtk phones so always prefer to match h/w version of firmware and handset as in pic
Micromax q338 have 2 deftrent h/w version v1 and v3 you can download from bilow link,if you flashed wrong firmware change firmware file and do format all+download with mtk sp flash tool ;;;;;