Member Avatar for davshing

Ok im fairly good at knowing what wrong with a computer but this perplexes me, my computer powers up but it doesn't boot, i started from step 1 everything out processor mobo and hdd nothing else expt the power cords, the LCD says that it receiving signal because when you unplug it says, no DVI, ive tried removing th RAM nothing, one stick at time nothin, jsut teh same old process of turning on but no display, the HDD light dosn't go on tho, but i can hear it working is there anything im missing, ohh yeah the PSu is fin i tested it wiht one of those testers, HDD works in my other desktop, only thing ive changed is the case and that's like yesterday, soo someone tell me what im doing wrong or if its time to invest into a new motherboard?

  • 2 Contributors
  • 3 Replies
  • 183 Views
  • 1 Week Discussion Span
  • Latest Post Latest Post by davshing

Dani AI

Generated

Short primer: a system that powers on but shows no POST commonly comes down to motherboard failure (often failed electrolytic capacitors), a PSU that looks “good” on a tester but collapses under load, or a short/miswire introduced during a case change. ’s prompt about audible BIOS beeps is exactly the right direction — beep codes or a POST/debug LED are the fastest indicators of what layer is failing — and ’s follow-up that a defective capacitor led to replacing the board matches a frequent real-world root cause.

Practical, prioritized troubleshooting (work top-to-bottom, stop when it posts):

  1. Do a minimal bench test: mobo, CPU + cooler, one known-good RAM stick in the primary slot, GPU only if no onboard video, and PSU. Power briefly and watch for beeps/LEDs.
  2. Add a system speaker or use the board’s POST LEDs; no beeps + no LEDs usually indicates early motherboard/CPU/VRM or power-rail failure.
  3. Visually inspect caps for bulging, leaking, or blown tops; also look for scorch marks or damaged traces.
  4. Swap the PSU or test voltages under load with a multimeter — simple plug-in “testers” don’t show rail collapse.
  5. Check for shorts: remove the board from the case and bench it on non-conductive surface, ensure standoffs match holes and front-panel connectors are correct.
  6. Reset CMOS (clear jumper or remove battery for a minute) and reseat CPU and memory.
  7. If still dead, a POST card or swapping with a known-good motherboard/CPU narrows it to a component replacement.

Notes and cautions: recapping can fix boards but requires soldering skill and correct capacitor specs; for many modern boards replacement is cheaper and safer. After replacement, verify BIOS settings and run memtest86 and a CPU stress test to confirm stability before any overclocking.

Member Avatar for davshing

Specs,
intel quad Q6600 @2.66 stock
8 gigs pc6400 ddr2
NEW haf 922 case
500 gb westerdigi(1 tb exteranl)
win 7 ulti
some dinky old Cd player
readon hd 5770
Intel DG35EC how sad my motherboard is like soo old

Edited by davshing because: n/a
Member Avatar for ajezovnik

can you hear some sounds, when you turn it on ? (MOBO speaker)

Member Avatar for davshing

no its fine i tested all teh CAP's and it seens one of them was defective so i got a new motherboard and i got my think clocked at 3.8Ghz :D

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.