iPhone stuck in recovery mode

My phone started randomly shutting off and then on again. Every time it would turn on, it would be on for a minute or even less, turn off again and then start turning on again on its own. I tried fixing it by getting it into recovery mode - that didn’t work even though I tried doing it multiple times. At some point, my phone just got stuck in recovery mode, and now it won’t turn on at all.

I also tried connecting it to iTunes and updating iOS while in recovery mode, but every time I would get some sort of error, usually error 75.

I have no idea what else to do, and I would like to avoid putting it into DFU mode. Any help would be greatly appreciated. Thanks!