I was trying to upgrade my Dell Optiplex 960 MT's CPU, but after I dropped the new processor in, wired everything back up and pressed the power button, the 2,3,4 LED's began blinking immediately, and the power button was solid amber.
I tried putting the original processor back in, but got the same results.
The LED indicators light up immediately when the power button is pressed. Nothing shows on the monitor at all. Pressing F2 does nothing, as the fault is detected immediately, before any commands can be received to go into setup at all.
I saw two possibilities when looking up the LED indicator codes, with one saying "no BIOS". I've never heard of such a thing, but I found the BIOS reset jumper on the motherboard and jumped it. Nothing changed.
The other possibility was that the motherboard had somehow gone bad. I have no idea how that could have happened, as I hadn't done anything to the motherboard. But after a few days of having it nag at me, I found a replacement motherboard (0Y958C) and ordered it up.
I was all excited when it arrived yesterday, and set about taking the original motherboard out, and installing the new one, and installing the new processor along the way.
It was a pretty quick job, and before long I was ready to press the power button again, fully anticipating the machine coming back to life. However, once again I saw the 2,3,4 LED's light up again and the power button show a solid amber.
Again, I tried putting the original CPU back in, but still the 2,3,4 LED's lit up as soon as I pressed the power button.
I'm totally stumped here.
Why would this happen with two different motherboards (both 0Y958C's).
Any idea how to get the BIOS to be recognized again.....?
