I've built a new PC, and I get no BIOS screen, the monitor doesn't detect a signal and stays in standby. All the parts seem to be connected right, the fans are whirling (CPU, GPU and case fans), and various lights on the motherboard turn on. I have (all new): ASRock GX 890 Motherboard AMD Phenom II X2 555 BE (3.2 Mhz) Corsair Dominator 4GB Dual Channel DDR3 1600Mhz Sesaonic X-750 PSU HIS HD5770 1GB GPU Xonar DX 7.1 Soundcard (PCI-E) Samsung SpinPoint F3 1TB HDD Samsung Blu-Ray Drive I've disconnected all the devices, one at a time, and retried the PC, to no luck: Take Soundcard out Take GPU out (use on-board GPU for output) Take HDD & DVD drive connectors out Take all front panel connectors out (USB, HDD LED, Power LED, Reset Switch), leaving just the power button connected Try PC with each memory stick in turn (in case one is bad) Take both memory sticks out (not sure if the PC should boot here - but I assume I should get a BIOS error) Take CPU out (not sure if the PC will boot, but I was at least hoping for some activity from Dr. Debug - see next for what that is) I've not touched any of the jumpers. During all of this, the motherboard's built in LCD Dr. Debug screen, never changed from the 00. 00 means (according to the manual), passed control to OS loader. I'm thinking the problem is with, in order of likely hood: Motherboard, or CPU, or Memory Anyone have any ideas about what I could try or what might be faulty. Edit: I've tried the beep speaker on the motherboard (both ways in case I had it connected wrongly), and and no beeps. I'm guessing the fault is so far down, the motherboard hasn't even got to the diagnostics yet in order for the beeper or the Dr. Debug thing to work.