Hello, I am having an issue, I have a P5Q Pro turbo that won't post. I have checked all my hardware. I have an asus en9400gt videocard, intel 3ghtz CPU, KHX8500D2K2/4G RAM. IN A1 AND B1 SLOTS (THE YELLOW SLOTS) Western Digital WD20EARS Caviar Green 2TB SATA2 3GBPS 64MB Cache 3.5IN HD. I have check the CPU for proper seating and cleaned and re-applied the coolant paste just to make sure I did it correctly. I am super excited about getting this up and running, any help would be appreciated.
Try pulling 1 stick of ram. What OS are you using? If its Vista you can get all of your updates then shut down and install the 2nd stick and it should work.
If its not Vista you can still try that, if it still doesn't work then switch the ram sticks and try again. If still no luck then you need to check all of your wiring to make sure you wired correctly...
My apologies if this response is late, but I often have trouble with my board (same board) POSTing after a failed overclock. Also, I've had issues in the past with boards not able to POST when I first unbox and set them up. The typical way to fix this, is to reset the CMOS. On the P5Q Pro Turbo, the CMOS reset pins are below the bottom PCI slot. To reset it, unpower your system (unplug or switch off the PSU), then move the jumper from the leftmost two pins to the rightmost two pins for a few seconds, then back. Since I have to do this frequently, I've considered installing a switch on the pins, but found that I can leave the jumper off the left-most pins and still have the board boot. So now I leave the jumper off, and when I need to reset the CMOS, I just short the right two pins with a screwdriver or other handy metallic object and power up and boot.
My system is 4 years old and had similar issues. PSU seemed fine (mobo light was green and all drives and fans were running) but the system appeared to be hung on the "searching for USB storage devices". Actually the last line of the POST read "Device 01:".
The system appeared to be locked up. Some POST text was still there on the screen and all physical drives (including an internal DVD drive) were reporting as OK. Unfortunately, there was no new text past the "Device 01" line entry ... or so I first thought.
If you wait about 5 minutes, POST will get by this message. I do mean 600 seconds. It does take a long time to get past this message. The system does appear to be hung but actually it's not.
I still had problems but since I also hit several keys during initial bootup, including DEL, F2 and ALT+F2, I may have been my own worst enemy: on further reboots my computer was defaulting to booting from floppy drive (a floppy drive was never installed on this computer). Welcome to code written in the previous century.
What saved the day was unplugging the power to the PSU then removing the CMOS battery and rebooting. I tested the little 3V Lithium wafer and the meter showed 3.25V so technically not a CMOS battery issue. The battery was removed for about 5 minutes while I hunted for a voltage tester. A reboot WITHOUT the battery brought me back to a Windows safe mode screen. Another reboot with the CMOS battery back in place brought me back to the same Windows safe mode screen. Now I just need to check the drives and ... (crossing fingers) ... recovery complete.
Why would removing the CMOS battery trigger the system to remembering previous BIOS info? Possibly without BIOS data the system will attempt to scan for existing devices and I was lucky enough to have hardware connected in such a way that my primary hard drive was the first physical device found ...
I don't admit to knowing what the real problem was or why removing the CMOS battery worked but for those with the above POST issues this is certainly a very simple troubleshooting step and suggest you at least try this before physically handling/removing PSU, CPU or memory.