I followed the procedure in the MOON DUST section. I could see a lot of dust blocking the air to go through the heat sink. I cleaned it carefully without touching other things. BUT WHEN I REPLACED THE HEATSINK AND COVERED IT, IT JUST CAN'T RESTART. ??? Any one who can help. I'm out of warranty now.

Thanks,
Sayed

Toshiba does suck. I'm fairly sure I'm never going to buy from them again.

Yikes--the only thing I can think of is trying to remove the heatsink again, then re-seat it and make sure everything fits together properly. I remember getting the heatsink back in properly was a bit tricky, since there are so many contacts from the processor into the heatsink. I ended up placing the heatsink onto the contacts below, making sure it was properly aligned, then gradually screwing it in until it was snugly in place.

Other than that, I don't know what might have happened...

Once you removed the heatsink cover, did you see what looked like a screw with a lock and unlock picture on both sides of it? don't forget to relock it once you put it back in