iphone XS turns off when press on screen.

[smic717394]

Hi,

I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on the screen while open, it doesn't happen, but, pushing the screen back into its position on the frame, the press it and the phone dies.

It's not the screen that die, is the phone, I had it plugged and see the amps gets from 2A to 0. The screen was installed on another phone to test and it doesn't to the same on another phone.

I would appreciate any ideas as I'm driving crazy.

[mon2]

I would consider to apply thin tape onto all backside of this LCD to prevent shorting. Be sure each of the shields are back onto the board like before. Appears that the main board stack may have faced a physical hit that killed the screen and perhaps removed the solder joint of an inductor or filter. Try to test with a piece of paper between this LCD and the main board stack. Cut the paper to shape and see if the phone still acts funny or not.

[smic717394]

All the shields are back, alhow, the main shiend only has 2 screws left one on each side, still , it how it cames, it not the first time this phone has the screen replaced. It had another lcd no oled, and because was really cracked with no image I couldn't test it before. Anyway I don't think the problem is the problem is possible disconnect or fracture on the solder balls between the boards, because pressing on the board with the phone on and the screen attached doesnt turns off, also pressing on the screen while is out of the frame, does not turn off.

I will try to cover the back of the lcd, although there nothing that is touching as the board is cover with the shields, and the battery is non conductive.