Hi i'm installing a new system: Asus M3N-H SLI (builtin geforce 8300) motherboard AMD Athlon64 X2 6000+ socket AM2 2 GB Kingston 667 DDR2 RAM Psu Coolermaster True Power 620watt No peripherals are connected. The main power connector and the 12v 4pin power is connected firmly. I powered on the system. The cpu fan is running, the LED on the motherboard is lid (green for ON). However I'm not getting through POST. There's no POST beep, and no vga signal detected by my working monitor. The cpu heatsink is cold enough that i'm able to touch. If i remove the RAM, i get 1 long beep, 2 short beeps. According to AwardBios manual that means display adapter problem, which is what it should be 'cause my built-in display adapter uses shared memory. But if i remove the RAM and the CPU, i'm not getting any beeps at all. I've tested the RAM and it was detected on another computer. Is my motherboard faulty, or is it my CPU faulty? Or is it the cmos?

If you have two sticks of ram , remove one of the sticks and reboot. If successful go into the Bios and check the ram timing. If timing is incorrect set manually. Reboot, again if all Ok then insert the second stick. Some Asus brds seem to have a prob with 667 ram.

Without the CPU you will get nothing. Is the ram compatible with the motherboard? Are you testing this boot with motherboard installed in the case or are you doing a benchtest? If you cannot get a successful POST with only CPU, 1 stick of RAM, Powersupply, Keyboard, and Monitor connected to onboard graphics then either the PSU, RAM or motherboard is faulty. The fact you do get a bios beep error with CPU in place but no RAM is proof enough the CPU is ok. Goin' Fishin' (Some day)

Thanks for all the replies. I'm installing a new system, my mobo is installed in casing. I've got my friend's computer (what a pal) and i'm doing some testing. Here's my current progress: Testing 1: ------------ My Asus M3N-H AM2/AM2+ Motherboard My 2GB Kingston 667 DDR2 ram (x1) Friend's AMD Athlon 64 x2 4000 Result: POST ok, vga ok, no errors, can detect SATA hdd, optical drives, etc. Proves my motherboard and memory are okay? Testing 2: ------------ My friend's AM2 motherboard My AMD Athlon 64 x2 6000+ My friend's 1GB Kingston 667 DDR2 (x2) Result: POST ok, video ok, no errors. Since XP os is already installed, it continues to boot Winxp. XP runs, tested a couple of applications, runs fine. Proves my processor is not faulty? One thing i notice is that my processor detected by my friend's mobo was "AMD processor model unknown" ?? More question -------------- Now i have no idea what's wrong. Could it be my mobo's cmos?