It sounds like the display or display connector might have been damaged due to the overheating issue. Here’s what you can try to fix the Nokia Lumia 1320 blank screen problem:
Try forcing a restart by pressing and holding the Power + Volume Down buttons for about 10-15 seconds. If the phone vibrates, wait a few seconds to see if the screen turns on.
Shine a flashlight on the screen at an angle. If you see faint images, the backlight might be dead, which would mean a screen replacement is needed.
Plug the phone into a PC and check if it's recognized by Windows. If the PC detects it, but the screen stays black, it’s likely a display issue rather than the motherboard.
If there's no response, try a hard reset:
- Turn off the phone (or hold Power + Volume Down until it vibrates).
- Press and hold the Volume Down button.
- While holding Volume Down, press the Power button briefly until you see a "!" symbol.
- Press the following buttons in order:
- Volume Up → Volume Down → Power → Volume Down
- The phone should reset, but you will lose all data.
If the phone still doesn't turn on:
- Open the phone (you’ll need a T4/T5 screwdriver).
- Check the display connector (near the motherboard) and reseat it.
- If the connector looks fine, the display itself may be damaged, requiring a replacement.
If reseating doesn’t work, you’ll need a new LCD screen for the Lumia 1320. You can find them on eBay or repair sites. Replacing it requires careful disassembly but isn’t too difficult if you follow a YouTube guide.
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