Blank screen but working

Hello

This is a thread I read in many sites on the net but I'd like to know if someone would have an idea to fix the problem

I have a friend who wanted to sell me her IBOOK G3 800mhz 14 inch , when I tried it it was running perfect except a bit slow.. then she called me later on to tell me the screen went black and she already gave it to repair cos it comes from the video card.

I did what I read on forums etc.. on google. Applied metal parts under the GPU which runs very hot like the Wallstreet powerbook (the piece of art) . The screen then started to blink trying to switch on. I even had it blinking with straight color lines...

Pressing the side of the Track pad won't do anything at all

I started it with the T mode on my cube and it works perfect! I even Techtooled it 😉 but I can't do the test with video etc since I'm using the cube. SO the comp works fine.

My question is after I tried most things have u got other tries before I dessassemble it completely?! is the screen dead or just a part of the motherboard cos if it's working without the screen...

when turned on every keys works and wait for u to type the password. The only ones that don't work are the bright ones (since it's related to the screen)

thanks for reading.