It broke a couple months ago, so here's about all I remember. I had the screen hooked up to my ps1 with the power plugged in, but I'm pretty sure it was off. I smelled something hot (burning smell), so I looked around, and my ps1 screen was really hot. I unplugged it and let it sit for a while, but now when I try to use it, the backlight doesn't come on at all, and I get no picture on the screen. You can't even see the volume control on screen, although the screen does slightly flicker when I turn my ps1 on and off.
I may have had voltage coming into the ps1 through the controller ports at the time (long story, I was making a controller emulator) but it definitely wouldn't have been more than 5V or 6V. When I tried plugging in my controller emulator, it caused the power led on the ps1 to turn green, even though the power switch was turned off.
Sorry if everything I just typed sounds like crap, I'm really tired
edit: I also tested the fuses, and they're still good. The fuses that say ps1 and ps2 above them that is.