Member Avatar for pradeepdrajmane

case with my computer g845 display is that
1) when monitor disconnected shows no signal means monitor is ok.

2)keyboard and mouse work with other pc also power light and hd lights are working

3)I also tried to clear the bios by removing the button cell on mb and again putting after 1 min.

4)supply also working ok as fan of smps and processor working ok.

I think some problem with motherboard but no beeps are coming so its hard to locate the exact problem.

can anybody give the right suggestion to solve the problem ?

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  • Latest Post Latest Post by kes166

Dani AI

Generated

A compact, prioritized troubleshooting sequence that builds on ’s earlier work and on ’s GPU point, and answers the step-oriented request from . The goal is to isolate power, POST, and video paths quickly so the faulty subsystem can be identified without repeating simple checks already attempted.

Start with a minimal-boot bench test:

  • Remove all nonessential peripherals and drives; leave only PSU, CPU, one stick of RAM, the onboard speaker (or a speaker on the header), and video output (or the discrete GPU if no onboard video).
  • Verify both the 24-pin ATX and the CPU 4/8-pin are firmly connected. Power on and observe any motherboard LEDs, debug Q-codes, or speaker beeps.
  • If no POST activity, swap the RAM into a different slot and try a single known-good stick. If available, try a known-good PSU or a consumer PSU tester to confirm rails (5VSB, 12V, 5V) under load.
  • Bench the board outside the case to rule out a standoff short.

Video-path and GPU-specific checks:

  • If a discrete card is present, confirm its PCIe auxiliary power connectors are attached and the card is fully seated. Inspect the GPU fan and heatsink for seizure or dust buildup.
  • If the platform supports integrated graphics, test the motherboard video outputs after removing the discrete card — note that some platforms require clearing CMOS or a jumper to switch primary video.
  • Try alternate video cables and inputs and, if possible, a second known-working monitor.

Final diagnostic notes and next steps:

  • Look for obvious hardware damage: bulging capacitors, scorch marks, or the smell of burnt components. Use the motherboard manual to interpret LEDs/Q-codes or beep sequences.
  • Use a POST diagnostic card if available. Observe ESD precautions and keep power disconnected while reseating parts.
    Useful diagnostic details to record for escalation: exact motherboard model, PSU make/wattage, CPU model (integrated GPU or not), RAM configuration, and any motherboard LED/Q-code or beep behavior.

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Member Avatar for Bruce100

In the very different cases when the monitor and the keyboard both are not working what are the steps should be taken to resolve this minute problem. As in the work load.


Member Avatar for kes166

Your graphics card may be overheating. If your graphics card has a fan (most do) check and make sure it works when the PC is turned on. If it doesn't work, your graphics card is bad. Try pulling the graphics card and use on board video if you have it.

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