My old processor was an AMD64 3000+ with a K8T Neo2, with the latest BIOS that was only single-core support.
My new processor is an AMD64 X2 4400+, same board.
When I got it (the new processor), I popped it in, thinking it would start up so I could flash the BIOS to MSI's newest for my board, which has dual-core support. However, everything would appear to come on, but my monitor would say "Off Mode in 5 Seconds", so I couldn't get anywhere. A friend told me I should have flashed the BIOS to the dual core support first, then installed the new CPU. So, I got up some courage, took the new CPU/heatsink combo out, popped the old combo back in, and got it working so that I could flash the BIOS, which looked like it went ok. I then accidentally booted to Windows desktop, so I shut it down as quickly as possible and proceeded to put the new CPU/heatsink back in. I booted up and I got the same thing as before -- nothing, just the monitor coming on to tell me it was about to go into Off Mode. I did what my Mobo manual says to do to reset the BIOS settings, and now it won't even come on at all. Pressing the power button does nothing at all. That might just be something totally unrelated, but with my luck, I don't know.
Is "not coming on at all" a symptom of a fried motherboard? Do you guys (more knowledgable than me) think I fried my brand new CPU too, or what?
Here's the two options I have narrowed it down to, because I'm pretty sure something in there is fried.
New Motherboard that supports on AGP (my current video card)
- Gigabyte GA-K8U-939 Socket 939 ULi M1689 ATX AMD Motherboard
New Motherboard that supports PCI-E (and a new video card)
- ASUS A8N-SLI Socket 939 NVIDIA nForce4 SLI ATX AMD Motherboard
- eVGA 256-P2-N563-AX Geforce 7900GT CO 256MB 256-bit GDDR3 PCI Express x16 Video Card