Hi, I've a strange problem with my laptop. Because of a downgrade of the BIOS the screen is black and the laptop seems to be dead. When I turn it on I'm not able to enter BIOS but after some second the fan start so I suppose the laptop is turned on but I can see nothing on the screen. I tried with another monitor but without results. The mainboard is the model 15208-3. Someone has ideas to suggest? I also tried the 1508-2 BIOS but nothing changed. Many thanks in advance