Member Avatar for robert.murdock.18

I recently bought new pc parts, namely a z77 pro4 motherboard, 2 sticks of 4gb g skills ram and an I5 processor. when installed for the first time, i thought i had set to boot from usb so i could reinstall windows from my usb stick. this didnt happen and it proceeded to run windows repair. now i cannot get a signal to my monitor. I have tried going back to my old pc parts with the same result, no signal to monitor. is it possible that this attempted repair has stopped it running correctly? it ended by saying that it cannot find a solution, so i thought it didnt do anything. computer all lights up the way it always has just produces no signal. neither board came with a speaker so i dont know about the beep system.

so far i have tried several things, i have taken the ram sticks out 1 by 1, tried all slots, no change.
removed the bios battery and replaced, no change.
taken out the graphics card and tried the monitor straight into motherboard, no change.
tried holding the power button for a minute too drain excess power, no change...

is there anything else i can try?

  • 2 Contributors
  • 4 Replies
  • 278 Views
  • 1 Day Discussion Span
  • Latest Post Latest Post by Djmann1013

Dani AI

Generated

A focused troubleshooting checklist and likely causes based on 's updates and 's cable suggestion: the monitor and lead have been verified elsewhere, and the system powers but produces no sync. That pattern usually points away from the display and toward power delivery (CPU/GPU), motherboard/PCB issues, a CPU/socket problem, or a POST-level fault.

Try these steps in order (safely power down and unplug before touching anything):

  1. Confirm dedicated CPU power: the board's 4+24/8+24 pin layout must be fed by the PSU's matching connectors. If the PSU only provides a loose 4-pin where the board expects a full 8-pin EPS, the CPU (and integrated GPU) may not get stable power — test with a known-good PSU that has a proper EPS cable rather than adapters for a reliable diagnosis.
  2. Bench minimal outside the case: place the board on a nonconductive surface, install CPU + cooler, one RAM stick in the slot the manual recommends, connect PSU 24-pin + CPU EPS, and use either the onboard video (only if the CPU has an integrated GPU) or a discrete GPU with its PCIe power connected. Power the board by shorting the power switch pins briefly. Observe fans, LEDs, and any beep codes. A successful boot here suggests a short or standoff problem in the case.
  3. Verify whether the installed CPU includes integrated graphics; if it does not, onboard video ports will remain inactive and a powered discrete GPU is required.
  4. Listen/inspect: attach a system speaker or watch the board’s POST/debug LEDs for error codes. If none exist, try a POST card or a spare GPU/PSU/RAM to isolate components.
  5. Physical inspection: look for bent/misaligned pins in the CPU socket, misplaced standoffs, or visible PCB damage. Also confirm the cooler isn’t over-torqued and that the CPU is seated correctly.
  6. BIOS/compatibility: if the CPU is newer than the board’s shipped support, a BIOS update may be needed — but only attempt that once a POST or BIOS‑flashback facility is available.

If those steps still yield no video, the failure is most likely a defective motherboard or PSU and bench testing or RMA is the practical next move. Grounding/ESD precautions should be observed during all handling.

Recommended Answers

All 4 Replies

Member Avatar for robert.murdock.18

the related article mentions a power supply compatability issue at the end, the old motherboard had an extra 4 pin power cable going into it at a socket labelled "3". the z77 doesnt have this. however that still wouldnnt explain why my old hardware wont work.

something ive just noticed, the monitor does recognise when i take the cable out of the motherboard as it changes from no signall to no cable attached..

Edited by robert.murdock.18 because: additional information
Member Avatar for Djmann1013

Try checking if you plugged it in wrong or try bending the cord a little to see if the cord is bad.

Member Avatar for robert.murdock.18

monitor/cable is fine, using it attached to my laptop atm

Member Avatar for Djmann1013

The port for the monitor on this other computer you have may be bad then.

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.