The notebook belongs to a friend. He has had it for less than 4 years. I have tried everything possible. Looking at dead devices etc. The fan, the cmos battery are all in working order. It is not the screen because i connected it to an HDMI monitor and it still will not go thru the boot sequence. I looked for a BIOS update and found references for a different acer model. It could be a damaged motherboard or a component on board the MB. Just asking have I missed something here?