Chosen Solution
My ps5 beeps three times then shuts off shortly after ive done some research and ive concluded that it is a firmware problem but as it shuts off shortly after i cannot properly system reset ive seen a youtube video of someone with the same problem but i cannot figure out how they formatted it and as my ps5 has had a prior roach infestation (due too storage at a hotel) i cannot send it in too sony too be fixed. https://www.youtube.com/watch?v=_EHqr39h… (video in question)
If it does not go into safe mode or does not stay on, it’s a hardware problem, don’t assume this is software. Go to Sony to have it fixed.