I had to take the laptop apart to get the GPU fixed - overheating issue, this took about 2 weeks.
The laptop was left unplugged - no battery, cmos battery, ac etc connected.
Now I have re-assembled it (I think correctly), but it won't boot.
AC power connected - ac led is solid green.
When I try to boot it, the "on led" (power led? The left-most one) flashes green a few times then turns off. The CD drive clicks slightly, and if a CD is in, the led on the drive flashes.
I am thinking that because I left it unplugged for so long that the BIOS has been lost (?).
If so, how do I re-flash it - I can't even use the boot cd, because not enough bios starts to get to the F12 screen.
If not, any ideas on what the problem really is?
I have now replaced the motherboard, but it has exactly the same symptoms.
The fact that it fails POST, makes me think that it is some other component.
I am now going to try a new GPU incase the repair failed.