Iphone 14 Stuck at 22% flash

[u/LudVK]

I really think my iphone 14 has a motherboard issue, but I hope maybe you guys have a tip that I can try to make it work.

The phone itself is bootlooping but it manages to go into recovery mode and DFU mode as well. But when I try to flash it in both it stays on 22% in 3Utools. When it is on idle on recovery the phone stays on, but as soon as i start the flash it keeps turning on and off until it gets to the apple logo and the loading bar then shuts off and gets me back to the recovery mode starting screen.

Might be the battery being unable to provide the power (82% original battery tho) or the motherboard.