Member Avatar for kundi13

right....today i fitted all my components together but when i pluged the power supply lead and turn the power supply on it makes a litte scratching noise and the fan in the power supply spins for less then a second and stops . however there is a green light ON on the mobo which im hoping thats a good news and that i havent done any damage to the mobo.
i carefully followed the manual aswell that was given to me with the mobo. HELP!!!! :cry:

  • 5 Contributors
  • 11 Replies
  • 128 Views
  • 4 Months Discussion Span
  • Latest Post Latest Post by hellbell_rulez

Dani AI

Generated

Symptom reported by — the PSU fan spins briefly then stops while the motherboard standby LED stays lit — is a classic “power-on protection” behavior. That can be caused by a short to chassis, a missing/poorly seated auxiliary CPU-power feed, or an actual PSU or motherboard fault. The suggestions from and about PSU, RAM and CPU are on target; the checklist below fills important diagnostic gaps and puts the troubleshooting into a safe, repeatable order.

Start an isolation/bench test: with the system unplugged, remove all nonessential peripherals (drives, extra PCI cards, front-panel USB/audio headers). Place the board on an insulating surface (cardboard), install only the CPU + cooler, one known-good RAM stick in the primary slot, the main ATX connector and the auxiliary CPU 4/8‑pin power connector, and the graphics card only if required for video. Use the case power-switch leads or briefly short the power-on pins to start the board. A connected motherboard speaker helps capture POST beeps for diagnosis.

If the PSU still dies immediately, inspect for shorts: look for extra standoffs or stray screws under the PCB and confirm no headers (front USB, HD LED, reset) are shorting pins. To isolate the PSU itself, test it disconnected from the board (paperclip/PS_ON to ground method) only if comfortable and with caution — better: borrow a known-good PSU or use a multimeter to confirm +3.3V/+5V/+12V rails and the +5VSB before further testing.

Notes tied to earlier posts: test RAM sticks one at a time as recommended; check heatsink retention and paste as and noted (though poor mounting usually causes shutdown after a few seconds, not an immediate stop). If bench testing still fails with a known-good PSU and minimal parts, RMA or swap of the motherboard (or PSU) is the next logical step.

Recommended Answers

All 11 Replies

Member Avatar for djrivera1

Sound like a underated power supply.

Member Avatar for BeastOverlordH6

RAM, motherboard, and processor are the likely culprits. Make sure everything is connected well, nonetheless.

If you have multiple sticks of RAM, put only one in at a time to test them.

Your motherboard may be faulty: New boards can be duds from the start and should be refunded. MSI and ASUS are very trusted brands through my building. You probably haven't done damage to the motherboard, either...

Check the processor for any visible signs of damage. Otherwise... new board.
For the reference, what kind of power supply are you using?

Member Avatar for kundi13

mobo: asus p5wd2 premium.
power supply: akasa powerpax 400watt.
pny 1gb ram
pentium 4 3.2 ghz cpu
gforce t6600 with turbo cache

ive also tried it with another power 400watt power supply that came with the case but still same thing happened green light came ON on the mobo but no fan nothing was powering up.

Member Avatar for kundi13

and also with my case i have 2 usbs attached to it which are on the bottom on the front panel. i have 8 lil wires coming from the front usbs (4wires for each usb i think) for one usb there is a red wire which says vcc1 on it you also got green = data+1, white = data-1 and black = gnd1 and same with the 2nd usb aswell. do i also need to connect to them on the mobo aswell inorder for the pc to power up if not then where can i connect them on the mobo??

Member Avatar for djrivera1

and also with my case i have 2 usbs attached to it which are on the bottom on the front panel. i have 8 lil wires coming from the front usbs (4wires for each usb i think) for one usb there is a red wire which says vcc1 on it you also got green = data+1, white = data-1 and black = gnd1 and same with the 2nd usb aswell. do i also need to connect to them on the mobo aswell inorder for the pc to power up if not then where can i connect them on the mobo??

Intel Standard USB header Layout: (used by over 90% of motherboards)

2. (P)(D-)(D+)(G)(KEY)
1. (P)(D-)(D+)(G) NO PIN
On bottom right side of motherbord You will see will it say in small letter front usb.

Member Avatar for djrivera1

Oh and get rid of that power supply cheaply made power supplys cause problems down the line. go with Antec power supply haven't had one burn out yet. And as for why it not powering up check ram and CPU also make sure you got your power and reset button wire right.

Member Avatar for kundi13

im sure that power supply is ok. i got this power supply link below

Member Avatar for djrivera1

Your right it isn't bad got dual 12v rail and very good reviews just didn't heard of them.

Member Avatar for BeastOverlordH6

djrivera's completely right about the Antec power supply investment... only real company I've been able to trust in hopes my computer doesn't die from a surge or current issue (then again, I'm avoiding that problem by directly plugging my computer and monitor into the ports of a wall socket :D)

Member Avatar for maxq

If the system turns on but then off immediately, chances are it's an overheat problem. First unplug the box. Make sure your CPU is seated and secured properly as per the manual. Then make sure that pesky Intel heatsink has all four pins depressed completely and has made correct contact with the CPU. If it's not on there just right, the gaps will allow the processor to overheat, immediately shutting down the system.

Member Avatar for hellbell_rulez

I tend to concur with "maxq" but also i woud suggest to check the thermal paste...don't allow the cpu and fan to have actual metal to metal contact.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.