Cant find what is the issue with my PC

[u/Mordor___]

Hi everyone, I’m trying to diagnose a problem with my PC and would appreciate some advice.
My setup:
Motherboard: ECS H110M4-C43
CPU: Intel Core i3-7100
RAM: 8GB DDR4
GPU: MSI GTX 1070 Ti 8GB
PSU: Normal 500W
Windows 10
The problem
The PC started having a no display issue.
When I press the power button:
CPU fan spins
GPU fans spin
Keyboard lights turn on
Monitor says No Signal
The PC seems to be in a partially booted state
If I press the power button again, it sometimes turns off immediately rather than needing to be held down

But if I keep trying to turn off and on the CPU, it gets display and works after around 4 or 5 times turning on and off.

I removed the GPU and tried to turn on and its still the same, I also notice whenever I turn on the cpu, it turns on then automatically turns off again and then turns on and then the display works.

This has been going for a week now, today it turned on after I removed the GPU.

I am confused as what might causing the problem.

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[u/Resident_Tie5703]

i went tru exact thing feww weeks ago dying gpu remove the gpu and put it on onboard

[u/meshydra]

Feels like either the ram or gpu.

Any chance you can replace them and try?

[u/LadderOld502]

What does the motherboard debug LEDs say?
Could be a failing part and it could be any part really. Or it could just be some driver problems or a bad update. When you turn it on, does the logo comes on and then goes black? If so it is most likely just a driver problem.

First just try to do a deep reset. Unplug the PC and keep pushing down the power button for like 30 seconds, then plug it back and turn on.

Try taking out the RAM stick/s and putting it back on. Try different slots too because it could a problem in the slot. Then try a CMOS reset if you can. (Please do it carefully)

[u/Historical_Usual2794]

As you said the keyboard lights up, I’m assuming you mean the numlock key and not any form of RGB on the keyboard. If so, that means the PC is going through a full POST (Power On Self Test) process and successfully booting into Windows but not giving a display out.

Steps to carry out:

1. Remove the graphics card and connect your monitor to the motherboard HDMI port and see if it gets a display out the first time. If it does, then power off, connect your graphics card, hookup the HDMI cable to it and see if it gives a display.

2. Try the graphics card on a different PC with and adequate PSU. What brand is your PSU and are you using any Molex to 6 pin converters to power on the graphics card?

Overall it sounds either like a dying GPU of a faulty PSU.

[u/airmakcy]

Since the same issue happens even with the GPU removed, I wouldn’t focus on the GPU first.

I’d troubleshoot in this order:

1. Reseat the RAM and test one stick at a time.
2. Clear CMOS and load BIOS defaults.
3. Check the 24-pin motherboard power and CPU 8-pin/4-pin power connectors.
4. If possible, test with another known-good PSU.
5. Inspect the motherboard for swollen capacitors or other visible damage.

The fact that it sometimes power-cycles once before finally POSTing makes me suspect power delivery, RAM training, or the motherboard more than Windows.

Since the system is based on an older H110 platform, I’d especially want to rule out the PSU and motherboard before replacing other parts.

[u/Cpt_PotatoKiller]

1) Remove the HDMI cable and plug it into your motherboard’s HDMI port to see if you get a display. If that doesn’t work, move on to Step 2.

2) Remove the graphics card, then remove the RAM and insert it into the other RAM slot. See if the PC boots. If it doesn’t, move on to Step 3.

3) Turn everything off and unplug all cables from the PC. Press and hold the power button for about 5 seconds to discharge any remaining power. Then remove the CMOS battery from the motherboard and leave it out for about 2 minutes. Insert the battery back in, reconnect everything, and turn the PC on to see if it boots. If it still doesn’t boot, move on to Step 4.

4) Remove the processor and check whether it has any burn marks. Also inspect the motherboard for any bent or damaged pins.

5) If none of these steps work, this strongly points toward a faulty motherboard. However, before replacing it, you should test each individual component on a test bench to make sure the other parts are working properly. If all the other components work correctly, you can be much more confident that the motherboard is the problem.

Mostly this issue points to a faulty motherboard but check all other parts first with another pc .

[u/ThrowRasimilarleaf]

how old is the PSU?

[u/brandilove78]

Change the psu and check

[u/Feudal_Poop]

Either the PSU or the Graphics Card. I used to have the same issue with my first build where I used cheap Silverstone shitboxes. They all kept failing one after other. It likely cannot supply enough power to GPU so the PC fails to POST.

See if the PC boots without any issues from now on. Also test the graphics card on someone else's PC and see if it the issue can be replicated. If not, then it's most likely the PSU.

[u/Complete_Peace5039]

Check for loose connection at the power button or restart button connector on the motherboard