I had something similar once when my graphics card power cord was just barely not plugged in all the way (to the card itself). Took me ages to find that. So, make sure all your power connections to the components are solid, and into the PSU itself of course.
In other conversation, I've been playing Rabi-Ribi a lot lately, kind of LTTP on it but yea. I can sort of see why people might like it at first but I think it's another 6 or 7 out of 10 for me so far. The RPG-ness is vastly overtuned and basically meaningless, everything scales so much that even in the mode where going out of your way to find items is supposed to give you an advantage, the bosses are the same level as otherwise. I even used maps to track down powerups I was missing because in both modes I just feel weaker and weaker as the game goes on. I might look at some boss fight videos or something just to see if there's some major thing I'm missing, but I'm doing everything I know how to do and boss fights are just a slog and really not fun to do the same fight, one time, for 15-20 minutes beating their HP bar up pixel by pixel. The non-boss rooms it feels like you scale a little bit but new areas always do 1/4-1/5 my health per hit no matter how upgraded I've gotten.
Basically, it's another example of "why have this system at all if it's pointless" and the game seems designed around a pointless system so... dunno. If the stats and upgrades scaled like a traditional metroidvania I think it'd be a lot more fun, I'm just sick of constantly almost dying and insanely long boss battles. The last boss fight I did wasn't that hard but I had to cheat my way through the end because my finger was actually tired from holding down the charge button constantly and I was just bored of dodging and I sure as hell wasn't going to do the first 20 minutes of that again
Much like Bloodstained, the more time I put into it the worse it seems to get.