Got an Acer 5315 laptop running Vista. Turned it on the other day and the ACER screen loaded and it asked to start Windows normally which I tried but screen went blank (all fans running normal etc). Turned off and tried last known good startup but done the same thing. Can boot to BIOS with F2. Thought the problem could be the hard drive so I bought a new one but does the same thing? Tried an XP install disk and it reads it OK but then reports that no hard disc found. Do you think the motherboard might have gone as it is not seeing the Hard disc? Thanks,Tony.