Member Avatar for sharman

Big problem with me :sad:

I am using the following components

Coolmax 400W V2.01 Power Supply
Intel Celeron 340 2.93Ghz 533FSB Socket 478
Asus P4V8X-MX Socket 478 Motherboard
Maxtor hard drive
PNY DDR pc 3200 memory 512 mb.
I bought this new motherboard, powersupply and cpu
when i assembled allthings together. I got it turned. cpu fan was running.
Nothing else, now powersupply to hard drive cd drive to mouse or keyboard and no signal to monitor
Can any body please help me to solve my problem
I am doing this first time

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Dani AI

Generated

Quick, targeted troubleshooting to narrow the fault and avoid swapping parts blindly. is right to focus on connectors; add the steps below to isolate whether the problem is the power rails, a short on the board, memory, or the drives.

  • Do a minimal "bench" boot outside the case: install only the CPU, one memory module (try each slot), the video output (onboard or card), the 20/24-pin main power and the separate CPU 4-pin/12V power plug. Use a small speaker on the mobo speaker header for POST beeps. Power on by shorting the two front-panel power pins if you do not trust the case wiring. Note any beep pattern or LED activity before adding other devices.
  • Check for motherboard shorts: remove the board from the case and run the bench test on a nonconductive surface (cardboard). Confirm there are no extra standoffs/screws under the PCB and no metal touching solder points.
  • Memory and CPU checks: try each DIMM alone in the correct primary slot, reseat the CPU and cooler, and closely inspect the socket/CPU for bent pins (common on older sockets).

If drives run only when connected to the PSU but stop when hooked to the motherboard, treat that as a potential short or PSU protection trip:

  • Try a different IDE/ATA cable and check master/slave jumpers or use the drive as the only device on the cable.
  • Test the drives and cables on another working PC or test the system with a known-good PSU. Some PSUs will shut down instantly when a short or overcurrent shows up on the data-side wiring.

Final notes: clear CMOS (battery out or jumper), avoid ESD, and do not probe live connectors without proper tools. If a bench test with a known-good PSU and single DIMM still gives no POST beeps, the fault is most likely the motherboard or PSU; swapping those is the next diagnostic step.

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Member Avatar for nizzy1115

Make sure that you followed all of the instructions off of the manual that came with the motherboard and have all of the pin settings correct. Also just double check that all of your power connectors are inserted all of the way.

Member Avatar for sharman

yes all cables are ok
if hard drive and cd rom are connected to only power supply and not to motherbaord, they are active, i mean i can open cd rom and can feel hard drive has power but if i connect them to motherboard, then they have nothing.

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