Monitor getting No Signal, Motherboard- Asrock B450 Pro4

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I’ve an assembled pc. I bought the above motherboard after recommendations from this forum in March 2020.
Suddenly, the monitor is getting No Signal error. When I start the pc the Num Lock key would work in the keyboard. I’ve checked the monitor with other pc/cable and it is working fine.
I got it checked with a local vendor at office, he diagnosed that issue is with the motherboard.
How do I deal with this?

Sometimes PSU problem also can be a cause check it once.

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Will you be able to get a different dGPU & check if it is the culprit?

Entire PC specs? What PSU do you have, and how old is it?

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bssunilreddy said:
Sometimes PSU problem also can be a cause check it once.

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How to diagnose that?

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omega44-xt said:
Will you be able to get a different dGPU & check if it is the culprit?

I’ve checked with nvidia gpu attached n detached. same result.

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DestGod said:
Entire PC specs? What PSU do you have, and how old is it?

Below is the specs with the year of purchase:

PSU: Corsair CX430 (2014)
GPU: Sapphire AMD HD 7770 1GB (2012)
CPU: AMD Ryzen 5 3600 (2020)
RAM: Corsair 1*16 GB LPX DDR4 (2020)
SSD: WD SN550 1TB NVMe (2021)
MBD: ASRock B450 Pro4 (2020)

Considering such an old GPU, I feel it might be a GPU issue, unless the local shop did try the system with a different working GPU.

IF it is mobo issue, contact AsRock for RMA. Should be in warranty as most mobo have 3 year warranty.

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omega44-xt said:
Considering such an old GPU, I feel it might be a GPU issue, unless the local shop did try the system with a different working GPU.

IF it is mobo issue, contact AsRock for RMA. Should be in warranty as most mobo have 3 year warranty.

Have tried starting by removing the GPU still no response.

Some basic troubleshooting

Clear CMOS by shorting the CMOS/RST pins on mobo when PC is completely OFF from the mains. Check mobo manual for correct pin position or physically check on the board.
Re-seat RAM a few times and recheck
Swap RAM from one slot to another
Reconnect all cables once again and make sure all are firmly connected
Try running w/o HDD/SSD. Sometimes undetected Storage/RAM may cause system to do noting upon power-on
Toms-Hardware forum has a compilation of check items for no POST issue. The checklist can be viewed here. Check if anything could be relevant from that "No POST", "system won't boot", and "no video output" troubleshooting checklist
If nothing works obviously RMA is the solution, starting with mobo as someone in your office has pointed out. If parts are out of warranty, then take it to repair shop and let them take care of the troubleshooting.

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patkim said:
Some basic troubleshooting

Clear CMOS by shorting the CMOS/RST pins on mobo when PC is completely OFF from the mains. Check mobo manual for correct pin position or physically check on the board.

Re-seat RAM a few times and recheck

Swap RAM from one slot to another

Reconnect all cables once again and make sure all are firmly connected

Try running w/o HDD/SSD. Sometimes undetected Storage/RAM may cause system to do noting upon power-on

Toms-Hardware forum has a compilation of check items for no POST issue. The checklist can be viewed here. Check if anything could be relevant from that "No POST", "system won't boot", and "no video output" troubleshooting checklist

If nothing works obviously RMA is the solution, starting with mobo as someone in your office has pointed out. If parts are out of warranty, then take it to repair shop and let them take care of the troubleshooting.

Vendor checked by removing the ram, gpu and ssd.. he diagnosed that issue is with motherboard

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Mind the dust.. I open my cabinet once in a million years

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Visited Asrock website support page and submitted my problem there. Its written that reply will come back after sometime.

theterminator said:
Vendor checked by removing the ram, gpu and ssd.. he diagnosed that issue is with motherboard

theterminator said:
Have tried starting by removing the GPU still no response.

R5 3600 won't boot without a dGPU, you need to check with a different GPU installed. CPU lacks iGPU, in case you don't know.

theterminator said:
Vendor checked by removing the ram, gpu and ssd.. he diagnosed that issue is with motherboard

If you're local repair person has a GPU, can you ask him to check your system with that?
Ask him to do the same with the PSU as well.

If none works, then send your motherboard for RMA.

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omega44-xt said:
R5 3600 won't boot without a dGPU, you need to check with a different GPU installed. CPU lacks iGPU, in case you don't know.

Didn’t know that. thanks

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DestGod said:
If you're local repair person has a GPU, can you ask him to check your system with that?
Ask him to do the same with the PSU as well.

If none works, then send your motherboard for RMA.

yeah good suggestion … will do tomorrow.. thanks

DestGod said:
If you're local repair person has a GPU, can you ask him to check your system with that?
Ask him to do the same with the PSU as well.

If none works, then send your motherboard for RMA.

+1 to checking PSU as well

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still trying to get locals to check on it…
meanwhile when i power on the cpu all the fans including cpu will start rotating except the gpu fan while sometimes only the gpu fan rotates while all others are not
i’ve tried connecting thru hdmi via gpu and directly to motherboard but in both get no signal error

theterminator said:
... and directly to motherboard but in both get no signal error

You were already explained that your CPU doesn't have built in graphics. No point in doing this.

theterminator said:
still trying to get locals to check on it…
meanwhile when i power on the cpu all the fans including cpu will start rotating except the gpu fan while sometimes only the gpu fan rotates while all others are not
i’ve tried connecting thru hdmi via gpu and directly to motherboard but in both get no signal error

GPU fans won't spin when they're idle or if there is no heat load. This is done to reduce noise.

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So I arranged a graphic card .. an entry level Geforce 210 by the local vendor …
My pc is starting with the new graphic card so it seems issue was with the old graphics card HD7770

Vendor is selling it for ₹2400/- .. i’m a little tight right now on budget so I may end up buying it for now … have my sights set on 1660 Super for sometime now but financials are not allowing it

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When I turned on my PC I saw that my system’s date and time were not updated. It immediately clicked me that I was having this problem frequently before the No Signal Error (System’s time was not updated when I used to turn on, it would update after a while or upon reboot as MS Outlook would not run).
Does it have to do something with the Cmos battery on motherboard?

theterminator said:
When I turned on my PC I saw that my system’s date and time were not updated. It immediately clicked me that I was having this problem frequently before the No Signal Error (System’s time was not updated when I used to turn on, it would update after a while or upon reboot as MS Outlook would not run).
Does it have to do something with the Cmos battery on motherboard?

Replace the CMOS battery & check - if issue exists, likely mobo issue.

theterminator said:
So I arranged a graphic card .. an entry level Geforce 210 by the local vendor …
My pc is starting with the new graphic card so it seems issue was with the old graphics card HD7770

Vendor is selling it for ₹2400/- .. i’m a little tight right now on budget so I may end up buying it for now … have my sights set on 1660 Super for sometime now but financials are not allowing it

2.4k is bit high for it, but cheapest one these days are GT 710 & 730 for 3.5k - 4k.

If you arrange money, look for RX6600 - costs 20-24k, better than 1660S or 3050. Sadly AMD is trying to kill budget GPUs IMO. Nvidia didn't release any new budget GPUs as AMD ones are just bad, so Nvidia is continuing with GTX 1650 & 1660S.

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After running on GeForce 210 for about a month, desktop has suddenly stopped working. When I'm powering it on then it gets into a loop where it will turn off and on by itself with nothing displayed on monitor. I've tried to leave it in the hope that it will end its loop and turn on eventually but it seems to be in an infinite loop.
What to do now?

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theterminator said:
After running on GeForce 210 for about a month, desktop has suddenly stopped working. When I'm powering it on then it gets into a loop where it will turn off and on by itself with nothing displayed on monitor. I've tried to leave it in the hope that it will end its loop and turn on eventually but it seems to be in an infinite loop.
What to do now?

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Do a CMOS reset - remove battery > press power button for 10s w/o power > turn it on w/o CMOS & check, later reinsert CMOS irrespective of if PC is working or not.

If still not working, test PSU:
landing.coolermaster.com/faq/how-to-test-a-power-supply/

Do check with single RAM, recheck all cables & stuff like that

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omega44-xt said:
Do a CMOS reset - remove battery > press power button for 10s w/o power > turn it on w/o CMOS & check, later reinsert CMOS irrespective of if PC is working or not.

If still not working, test PSU:
landing.coolermaster.com/faq/how-to-test-a-power-supply/

Do check with single RAM, recheck all cables & stuff like that

Tried with resetting cmos battery as per the steps above but problem still exists. Yet to try the power supply test since i dont have a paper clip …
also i tried turning it on without RAM and it would do the same thing

Go to local shop and test and swap out each component with them.

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pkkumarcool said:
Go to local shop and test and swap out each component with them.

I gave the system to local shop. He kept it for two hours and said he repaired the motherboard .. i asked the cause then he said something about power I/O covered in dust or something i could not decipher.
I had removed the hard disk before handing over the machine. Now when he was done he showed me the working of machine and it was indeed working. I could see the boot screen messages on their monitor. While this demo was being done, the system did not have my original cmos battery and before handing my machine to me they inserted a new cmos battery.
Now happy I brought the system home with the belief that it would work but to my surprise the machine was in the same state as I submitted which is it was starting and restarting intermittently by itself. I called the shop and agreed to handover the machine tomorrow.
This was possible when I had my day off today .. now i don’t know when the next muhurt (auspicious day) will come that i take this machine and go to the shop

The cost was ₹500/-.

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Issue was with the UPS. Its battery was dead from many months but it was not letting the pc turn on. Changed the battery and it cost me another 800/-.
Total expense is 1300/-

Also recently bought Geforce G210 for 2400/-

Total expense = 3700/-

theterminator said:
Issue was with the UPS. Its battery was dead from many months but it was not letting the pc turn on. Changed the battery and it cost me another 800/-.
Total expense is 1300/-

Also recently bought Geforce G210 for 2400/-

Total expense = 3700/-

What UPS was it? I remember that an old UPS at parent's place was not providing battery life at all but was not hindering pass through of current.

I have a Intel DH67VR mobo and a i5-2500 processor which I bought in June 2011, and it has the same 'no signal' problem since over a year. I am guessing that the problem is with the mobo. Luckily it works sometimes.