Not booting. Flashing power lights.
I am working on this Toshiba Satellite M45-S165 laptop. I replaced the motherboard about 2 months ago... and it is now returned to me with similiar symptoms. When I press power on, the screen stays black and the power light will flash green (and sometimes stays on) and the fan will run. usually the fan will kick on and run too. I have tried a hard reset by holding power button without anything plagged in, and no luck. Very rarely I can finally get it to boot into windows, but it will usually shut down and go black. Any suggestions? Mother boards are not a cheap thing to replace.