iPhone 5S random blue screen retart
So I've replaced a screen on an iPhone 5S like I've done so many times! But this time the phone acts weird.
It randomly comes with blue screen and restarts the phone. If I didn't knew better I would say it is because it gets to hot ?
I've updated the phone to IOS 9.2, factory recovered through DFU mode, tried another battery, tried to replace the new screen with the old screen, I made sure all the screws is in the right place, checked all the LCD connections on the motherboard and there is no visual damage.
If the phone just lies not being used I don't know when it will restart. When I make calls, using maps and so on it takes 1-3 minutes.
So, do you have a smart idea on what it could be?
UPDATE 11-01-16 - The phone has been turned on with GPS navigation + flashlight without SIM card for about 1 hour = No problems.
Putting SIM card in the phone making a call for 1-2 minutes = blue screen and reboot.
Taking out the SIM card and doing a facetime call 1-2 minutes = blue screen and reboot.