I have a Acer aspire 5100 laptop which sounds as if it is booting up when it's turned on but there is nothing on the screen, it is completely blank.. I have plugged in an external monitor and tried booting, still nothing on the screen. I have checked the following
1. Checked cabling to main board and back of screen - all appear to be OK, have also tried a known working screen and inverter.
2. replaced memory sticks
3. replaced hard drive
4.removed and reseated anything that is removable.
The only thing i haven't changed is the processor. any suggestion in resolving this will be greatly appreciated