Re: Processor or mobo?
Yes the processor is necessary for the bios to load. Your problem could be caused by a lot of things, the cpu, mobo, battery/power supply, video, etc...
You can't just replace the cpu and video on some motherboards as they are "built into it". So when you buy the motherboard you may be buying all of those components. If your Laptop is 5 years old you should replace it with a new model as the repair is not worth the price.