Member Avatar for iamsmooth

I've never encountered anything like this and have no idea where to begin to troubleshoot. What happens is when I turn on the computer, it will show the motherboard (gigabyte) splash screen, then cut to black and monitor says it's going to sleep... meaning the display signal got cut right there. The computer remains powered, but nothing happens and it never loads to OS or anything. Not sure what this could even mean. Any ideas? Thanks!!

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Short expert summary and a focused diagnostic workflow for the Gigabyte system described by . Several replies (notably , and ) have already touched on BIOS, memory and the monitor. The steps below build on those points with targeted checks that isolate the video subsystem, the motherboard/POST stage, and power delivery without needless parts swapping.

  1. Observe POST indicators and beeps. Many Gigabyte boards have Q-LEDs (CPU, DRAM, VGA, BOOT) or a two‑digit debug display; a speaker on the front‑panel header will add beep codes. Record which LED or code stays lit.
  2. Minimal-boot test. With power unplugged, remove drives, USB devices and add-in cards. Leave CPU, cooler, one known-good RAM stick in the recommended slot, and GPU only if there is no onboard video. Boot and watch POST behavior.
  3. Video subsystem checks. Verify the GPU auxiliary PCIe power cable(s) are fully seated (6/8‑pin). Try a different video cable and port. If motherboard video exists, test there or temporarily swap to a known-good GPU.
  4. Memory isolation. Run MemTest86 from USB or test each module one at a time in each slot to separate a bad stick from a bad slot.
  5. Power rails and PSU health. A PSU failing under load can kill GPU output mid-POST. Use a PSU tester or swap with a known-good PSU if possible.
  6. CMOS and BIOS: clear CMOS (jumper or battery) and, if the board supports it, use BIOS recovery/double‑BIOS procedures rather than blind reflashing.
  7. Visual inspection: look for bulging caps, burn marks, loose heatsink/CPU pins, or disconnected fan headers.

Always disconnect mains power and observe ESD precautions when reseating parts. If the symptom persists, the POST LED/code pattern plus whether GPU fans spin or any beeps occur will narrow the fault to PSU, GPU, RAM, or motherboard.

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Member Avatar for TrustyTony

Have you tried to enter the BIOS or to push ESC to see text instead of the splash, then hit PAUSE before monitor goes?

Member Avatar for KushMishra

I sugesst you to kindly replace your RAM with another one and check if it works.
If this works then you may be facing some problems in your RAM and if possibly it doesn't boots up again even after changing the RAM then you may have a different issue other than RAM for sure.

Thanks :)

Edited by KushMishra
Member Avatar for flagstar

or if possible, try to use another monitor. Maybe you've been messing around with the resolution setting and set it too big for your monitor to support. Another possibility is your monitor has problems.

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