jekan soraf

First take backup of mobile and restore to factory default. Check whether ribbon cable of back camera or soldering is proper. If cable is is loose refix it.

Battery and charger are working fine. Now only issue remaining is power assembly. Check soldering of charging point of samsung j%.

If you forgot your passcode then you can recover that passcode using third party software. Or even you can get it by rooting Huawei mobile. It allow access to root file/ By which you can unlock Huawei mobile. But if Huawei is network locked then use this method http://mobile-cellphones.blogspot.com

Try another battery which is fully charged. Also try some working screen with iphone. And test iPhone does it work or not. Then you will have exact idea where there is problem with battery or logic board.

Best way is to restore iPad with iTunes as iTunes can detect it. You have latest ios version on iPad. Before this try to update iPad. Update will not delete data on iPad. Restore iPad will erase all data on iPad.

Will you explain what happen when you try to restore through dfu mode. I don’t think there is major hardware problem. Just some loose connection or dry solder. Try some means which can restore iPhone. Better to open iPhone and refix all cable firmly.

It does not means that new model has all hardware and configuration are changed. iMac 2019 has latest operating system Mojave and also more RAM and more powerful processor. Normally all PC Manufacture release new model after few changes to older model. same for iMac 2019

Try to reset camera to factory default If possible. Remove battery and then press and hold power button for 10 second and then reinsert battery. Different camera has different way to reset check manual.

Keep connected iPhone to charger and update iPhone to latest ios version. Try another battery on your iPhone. If iPhone work fine then there is battery issue.

First check that your charger is working I mean to say try to charge other phone with that charger. If other phone is charging properly then there is no issue with charger. Now If your battery is charged and still your mobile is not turning on then remove battery. Clean three battrey connector point and again fix battery. If this not solve your problem then check power assembly and display screen cable.

when mobile dont turn on there may be problem with battery or display. or otherwise need hardware fail at boot time.