Built it, Installed OS, Rebooted, Doesn't work

[AaronZzz]

Hi,

I'm yet another poor sap in need of help:

ASRock K8Upgrade-NF3 (754-->939) Motherboard
(w/ integrated LAN & Sound)
Sempron 2500 1.4 Ghz / 64-bit Processor
450W Power Supply
Geforce2 MX-400 4x AGP (new card ordered)
250 GB WD Caviar HD
512 mb PC3200 RAM DDR SDRAM 400mhz

Everything was done.... I had just rebooted from Service Pack 2 and was installing programs. I installed Norton Security Center and told the system not to reboot so I could install the "nVidia All In One" driver from the motherboard CD. After I did that, the CD told me to reboot, I did so.

I then pressed F2 & held down shift (I knew one of those would get me into the BIOS) so I could take another look since I was rebooting anyway. I noticed that my PC3200 512 mb RAM was set at 333mhz, so I switched it to 400 and saved my BIOS. It then continued loading up.... only nothing happened. So I hit the reset key. Windows asked me to load in safe mode (or whatever) and I said "Nah, it's probably just too many changes, it'll load fine this time." It wouldn't load up again. So I hit reset again. Only this time, the HD light flashed as normal... then it went through all of the drives. But the keyboard didnt light up and the HD green light went out.

So basically I have a computer that now gives me a black screen. No beeps, no nothing. Apparently the system doesn't get past the drive check because it won't load from either a boot CD nor a boot 3.5 disk. The keyboard and graphics card work just fine on my other computer, I've tested.

What's next? Take apart this beast or what?

[Rolandooo]

have you tried to clear your CMOS? if not turn off move the jumper and then move it back into normal position and try to power up!

[ktkendall]

Not quite sure how you saw your ram to be at 333, but the bus speed should actually be at 200 for the memory to run at 400 cause it's ddr, so it essentially doubles the bus speed, Sounds like you now probably have your machine overclocked too far and thats why it won't boot.. Yes you'll need to do as advised above and manually clear cmos, which sets BIOS settings back to factory default so that the machine will boot up again..

[blue60007]

I highly doubt you can set it to 400Mhz doubled (for DDR, or 800MHz). I think it's set to DDR400, not DDR800 speeds .

Not sure about that particular CPU, but it might have to be set DDR333...I would clear CMOS and set it back where it should be.