Dear Forum Members,
I posted this questions on January 2, 2008 at 08:42:42 Pacific with Subject My 2 Motherboards acts Strangely!. But since then i have not been able to sort out the fault and more Computers seems to be inflicted with the same problem, unable to rectify the problem, the computers end up being thrown away without knowing main cause and how to get rid of the problem in future. Please check on the PC Specifications below:

[1.] MOTHERBOARD SPECIFICATIONS:
GenX P4M800-M Rev 1.03 Socket PGA 478
Processor : Intel Celeron D 2.26 GHz |256|553 SL78K MALAY Q540A642 0135
AMIBIOS 686 1999 TH43 7593 C 1.00 - 10A

Operating System: Windows 2000 Professional Edition
Memory Size: 128 MB DDR |333| CL 2.5

SYMPTOMS:
When the Pc is switched on, the Monitor goes on very briefly then the "[B]MONITOR IS NOT CONNECTED[/B]" appears on the Screen nothing else appears even POST Messages. I had to Change the RAM PC3200 256 MB DDR-DIMM CL 3 and worked for 1 month since then nothing seems to work anymore even by using the same 128 MB DDR |333| CL 2.5 and adding new Video cards.

[2.] MOTHERBOARD SPECIFICATIONS:
ASUS P2L97 Rev. 2.05
Processor : Intel Celeron 2 GHz |128|400 SL32A | 300A766
AWARD PCI/PNP 686 S/N 122505797 1998

Operating System: Windows 2000 Professional Edition
Memory Size: 192 MB DIMM

AMIBIOS 686 1999 TH43 7593 C 1.00 - 10A

Operating System: Windows 2000 Professional Edition
Memory Size: 128 MB DDR |333| CL 2.5

SYMPTOMS:
The Pc starts without power button being pressed to shut it down i have to disconnect the power cord from the Power Supply, the Monitor goes on very briefly then the "MONITOR IS NOT CONNECTED" appears on the Screen nothing else appears even POST Messages.

[3.] MOTHERBOARD SPECIFICATIONS:
Fujitsu Siemens Computers
Scenic D, i815e SDG-D1214
SNP: D815e-E11ZA
ABN: K636-V311-1325
Identnr. YBPP136250 1401

Intel 815 FW82815 F131WG56 SLSNQ Intel '99
SMSC LPC47M1075-MC B0120 - A94610 8H104363
Phoenix 1996 MK421

Processor : Intel PIII
Operating System: Windows 2000 Professional Edition
Memory Size: 192 MB DIMM

SYMPTOMS:
The Pc starts up immediately when the power cord is connected to the Power Supply without power button being pressed, To shut down computer down the power cord has to be pulled away from the Power supply unit, the Monitor goes on very briefly then the "MONITOR IS NOT CONNECTED" appears on the Screen nothing else appears even POST Messages.

The problem seem to affect alot of computers and end up being left to rot in stores. I have been asking this question for many times and in may forums but so far i have not been able to get the solution for the fault: whether it can be rectified or not and what should we do to get rid of the fault to keep on emerging from time to time.
Please let me know if with such a fault these motherboards have any chance of being repaired or have to be thrown away.

Start with the last symptom first. You may have the case wiring connected wrong, your PSU may be defective or the MBoard may be shorting out on the case. I suggest you go back to square one.

NOTE: The case standoff are installed behind every screwhole in the Motherboard

Can you please help me sort out these problems once and for all?. Your help is greatly appreciated.

To start with, I never heard of GenX before. Googling it turns up several of your old posts in different forums & numerous non-english (arab? sites). There is a model P4M800-M made by Elitegroup/ECS...could it be the same board under a different name?

The best way to troubleshoot something like this is to strip the system down to the bare minimum. Disconnect all drives & all internal cards except video. Disconnect all external devices except monitor & keyboard. If the keyboard is USB, switch over to PS/2. Remove all RAM except for one stick & make sure the stick you use is "known to be good"...same goes for the video card.

Then unplug the power cord & use the ClearCMOS jumper to reset the BIOS. Reconnect the power & attempt to boot. If you get a display, immediately access the BIOS & reconfigure the settings.

If the above doesn't work & you're certain that both the RAM & video card are good, you've narrowed it down to the board, CPU or power supply...or possibly a short in the case. The next step would be to remove the board from the case & benchtest it.

One thing to add - if a few fans spin up, it doesn't necessarily mean the power supply is good. All it means is the PSU is putting out enough power to spin up a few fans...it may not be producing enough to fire up a system. Fans generally run on +12v, a P3 uses +5v.

If all these computer were working at one time and they are all used at the same location I would start by looking at the voltages in the building and in the BIOS screens of each computer, If they still boot. Enter the BIOS immediately at startup and look at PC health or similiar screen.