A dead board or an upside down or off by row/pin IDE cable.
So my comp wont start, it was running fine the other day, I installed a new hard drive and an hour later it froze up. Now it wont even boot up. I replaced the power supply, no dice. Removed all components and still nothing. I thought it might be the BIOS battery, nope. Motherboard nope, well then it had to be the CPU, nope. Anyone help? When I press the power button the CPU fan moves a bit then stops. I removed the Motherboard from the case and tested it that way thinking the case may be shorting it somehow, nothing. Any ideas please help.