Windows 7 will not boot - not even to BIOS

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http://www.amazon.co.uk/gp/offer-lis...&condition=all

With a motherboard and system that old it would be a fine time to build a new computer.

This SOP for me in this type of situation.
Disconnect and or remove everything not needed for the PC to post. All you need is power supply, motherboard, CPU with heat sink, one stick of RAM, keyboard and monitor. If the motherboard has onboard video use that. Unplug all external devices except your monitor and keyboard. Unplug any optical drives and the hard drives and remove any add in cards like network, sound and video if not needed. Reset the BIOS to defaults with the motherboard jumper or by removing the CMOS/BIOS battery. Then see if it will post. If it won't double check all your power cables to make sure they are firmly connected. If you are using an add in video card reseat it to make sure it firmly in place. Reseat your RAM too. Then try again. If it does post then you can slowly add devices one at a time until it doesn't and go from there. If it still won't post then its one of the few devices still hooked up. I would suspect the power supply as a likely cuprite. Just an educated guess on my part, I've seen a lot more failed power supplies than failed motherboards.