A few months ago I bought a flax chinese TFT LCD screen just like the one here:
http://cgi.ebay.pl/3-5-TFT-LCD-Player-Monitor-KFZ-f-AUTO-DVD-DVB-T-TV-/250814152694?pt=Auto_TFT_Monitore&hash=item3a65b03ff6
Since I didn't have any manual for it (I wanted to know the psu pinout by experiment, so) I probably reversed + and - of psu for a Dang while (<1 sec), but when I connected it properly, screen just flashed in grey colour for a moment, and now it doesn't react to anything.
Is the screen that chinese that it breaks in the blink of an eye? Do any of You know how to fix that Playstation?
Please, MTV, pimp my screen!

P.S. Everytime I tried anything with it, I didn't connect it to any signal source, but I heard that then it will just show a blue screen. Correct?

[EDIT]
Sorry, I made a mistake. It flashes from time to time when trying to run it. And after a flash it's dead black.

Argh, I'm a dick. As an user on the other forum suggested - when there's no signal, the screen is just black. I connected my NES, and... everything worked. Now I only need a noac and a really tiny sound amp.
Sorry for this stupid problem, you may close the topic.

Hey have you tried running the screen on less than 12 volts? Perhaps 7.4? I am planning on using one in my N64 Mini Laptop

You cant fry the PlayStation 1. It has reverse protection diodes on all of the models. You would have jumped something, or exceeded the voltage limit...