10 days late response, but maybe ur gpu is not working anymore and ur hard drive may also be not working anymore. hard drives are cheap to buy and a gpu can also be cheap if u buy windows xp era stuff too, look on ebay for them
change ram sticks, but yeah i agree with the dude on top you should swap to a different gpu and see if it displays. I had that same problem before. It's a possibility that your motherboard caps are bad. Check and see with a flashlight if any of them are brown or bulging on the top.