Any of the lcd megas are very prone to power sups, and processors ....fans go and they cook themselves, there’s not a lot of breathing room in there ...... check your Psu first .... if that’s good it’s prob a cooked cpu... validator will always cycle that’s off the 110 line. .... if you’re getting no signal on the screen you’re at least getting 12v out of the Psu to light up the mon so most likely Psu is ok ..... pull the ram clean it and reinsert it see if it boots it not it’s the cpu ... if you’re not getting a post beep that’s not a good sign
they’re a bitch to work on it’s tight in there ... I still operate them and I replace all fans and Psu every year needed or not
and make sure to use thermal grease on the cpu... before buying a cpu pop it out and back in see if it fires up
Not much to them, you’ll get it going