Can't get replacement motherboard to work?

Question

I bought a second-hand JETWAY 993AS-L PCI AGP MOTHERBOARD with INTEL CELERON 533MHZ CPU + FAN
+ BACKPLATE for a project, but can't get it to fire up the display. There was a graphics board with it (I have a spare that I can try) I have fitted what I believe to be the correct SDRAM (133mHz) and have it connected to a previously working hard-drive/floppy drive and power supply. All the power components and fans kick in, but there is nothing sent to the screen at all.
What should I check now, or have I just bought a dud?
I even went out and bought thermal grease for fitting the heatsink/fan onto the CPU!!

Karz · Accepted Answer

Try the bare set up test= Mobo, processor with cooler, integrated or dedicated graphics (NO RAM, HDD, DVD and FDD) connected to PSU. This set up will NORMALLY give no display and the endless beep (RAM error since not installed yet).

Power OFF, then add RAM. Bare set up should beep ONCE, display POST then be able to open BIOS menu.

If bare set does not work, something (a short) is overloading the PSU thus activating the safety feature (overload protection). Mobo may be grounded to case or cpu heatsink (or its backplate if it is big) may be causing a short on mobo. Try running bare setup again but with mobo dismounted from case or not touching any metal part of case.

If bare set up works, the short could be on one of the devices that connects to power supply or motherboard. Install them one at a time to find out which will cause the problem.

Remember, the beep is the key. No single beep means processor and/or North Bridge are not powering up at all, only the fans.

moonpiglet · Answer

well seeing as it is second hand, it could be a dud, but maybe the previous user had a seperate graphics card and disabled on board graphics, try using a new graphics card.

Can't get replacement motherboard to work?

2 Answers