When I hit the power button on my acer aspire 7520, the fan starts and it sounds like the HDD starts spinning up and then it clicks and powers off. Then it starts doing the same thing over and over. No beeps, I don't think it's even getting to POST. I've seen this issue on forums and some people said that flashing the BIOS by putting the latest version on a flash drive and holding FN+ESC before hitting the power button. I did this about 20 minutes ago and it's not doing anything. Hard drive is fine, was able to plug it into another laptop. Wouldn't boot from it but mounted it with a linux live disk and retrieved data from it. Any suggestions?