Member Avatar for scuzzle

I have a motherboard K7AMA2 with Socker 462, my problem is, when i plugged the cable to the power supply, my computer start automatically, the cpu fan also running but nothing can view in screen, there's also no beeps. I tried to pulled out all IDE cables power, and jumper to the HDD LED, Power, and REset swtich but same problem. its automatically start. please help me

  • 3 Contributors
  • 2 Replies
  • 185 Views
  • 5 Years Discussion Span
  • Latest Post Latest Post by firdousahmad

Dani AI

Generated

Short summary: the system powering up as soon as the PSU is plugged in (fans spin, no video, no beeps) can be caused by several things. and were right to look at internal wiring, but a few more focused checks will quickly isolate whether the case wiring, the PSU, or the motherboard is at fault. The steps below are ordered so you can stop as soon as the fault is found.

  • Safety first: unplug AC, press and hold the case power button for 5–10 seconds to discharge caps, then remove the CMOS battery or use the CMOS clear jumper for a minute to reset BIOS defaults.
  • Remove the front-panel connectors (power, reset, LEDs). With those unplugged, plug in the PSU. If it stays off, the problem is in the case wiring or switch. If it still powers on, move on.
  • Test the PSU behavior: with front-panel connectors removed, try a controlled PSU bench test (short PS_ON/green to any black ground only if comfortable) or swap in a known-good PSU. If the PSU is being held on regardless of PS_ON, replace it.
  • Boot the board outside the case on a non-conductive surface with minimal parts installed (CPU+heatsink, one RAM stick, video if required). This rules out standoffs/shorts. Look for change in behavior.
  • Add a small internal speaker to the SPKR header to get POST beeps. If you get beeps but no video, focus on graphics/monitor. No beeps and no video despite the speaker usually means CPU, RAM, or motherboard failure.

If the board still powers immediately after these steps, the motherboard is most likely faulty (or the PSU is flaky). Follow static precautions; if any bench tests are outside your comfort zone, have a local shop verify the PSU and board.

Recommended Answers

All 2 Replies

Member Avatar for lightningdemon

your problem is that your mobo connectors to your case are connected wrong. Look at your manual and the LED, PWR LED, SPKR, HDD LED, RSET SWTCH configurations. you probably got a wire or two crossed. Try flipping them the other way if you've double checked and they are correct. The white side of each connector is always either the negative or positive. Its ALWAYS one of those, but at this point in time, I am afraid I cannot remember. Need sleep.

Member Avatar for firdousahmad

check the internal connections of ur computer i think they are wrongly connected

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.