The other day I left my laptop on a kitchen chair after I had been using it. When I came back a while later the screen had frozen and the only way I could turn it off was to remove the battery. When I tried to turn it back on I heard the fan start and the HDD spin but the screen stayed blank. There were no bleeps no post screen after a few seconds the fan stopped spinning the power light on the switch stayed on but still a blank screen. I presumed the CPU had overheated and failed so ordered a replacement. Having installed it I am still getting the same problem. Tried taking out Ram and dvd drive,
Any suggestions please - could it be a failed mobo?

Laptop is an Acer Travelmate 2450 with 1.5 gb ram Win XP pro

As always any and all help gratefully received

TP