Question Monitor randomly displays "D-SUB No Signal" ?

[argitis]

Hello. So for about a week, my monitor at random times during the day (no more than three times) will lose signal and will display the "D-SUB No Signal" error. At the same time, there is sound from whatever I'm watching on the monitor, but after 2-3 seconds it will lag and the only way to fix this, is to restart the pc. I've noticed that most of the times, this will happen after I stopped playing any demanding game (i.e. pubg with settings set to ultra, ets 2 with settings set to high).

The specs are:

Motherboard: B550 AORUS ELITE V2
CPU: Ryzen 7 5700X
RAM: 2x16GB Corsair Vengeance LPX DDR4
STORAGE: Western Digital Blue SN570 SSD 500GB M.2 NVMe
STORAGE: Western Digital SN770 SSD 1TB M.2 NVMe
PSU: Corsair 850W
GPU: MSI GeForce RTX 3060 Ti 8GB
SYSTEM: Windows 10 Pro

What I've tried so far:

• Ran sfc /scannow. It found some corrupt files, it fixed them but the issue still persisted.
• Reinstalled the gpu drivers through Geforce Experience. Issue still here.
• Changed the VGA cable that goes from the gpu to my monitor. Because it's an old monitor it doesn't support hdmi cables, so I have an adapter that goes from hdmi to VGA. That is the only cable that I haven't changed, because I'm still waiting for the adapter to be delivered.
• Cleaned the entire PC. Cleaned the gpu, the ram and the cpu fans. It still happens.

Besides the HDMI adapter possibly being the issue, any thoughts on what might be causing this?

 

[Lutfij]

PSU: Corsair 850W
Corsair is the brand of the unit, while 850W is the advertised wattage of the unit. What is the model of the unit and it's age? Have you tried sourcing(borrow, not buy) a reliably built PSU and tried powering the system with it to rule out your PSU to be the root cause of the issue?

BIOS version for your motherboard?

Reinstalled the gpu drivers through Geforce Experience. Issue still here.
Use DDU to remove all GPU drivers(Intel, AMD and Nvidia) from your platform in Safe Mode and reinstall the latest driver sourced from Nvidia's support site in an elevated command, i.e, Right click installer>Run as Administrator.

sfc /scannow
It found some corrupt files, it fixed them, the issue still persisted.
I would also try and reinstall the OS in offline mode, after recreating your bootable installer, then manually install all drivers in an elevated command, to root out the OS being the issue.

 

[argitis]

The PSU is: "Corsair RMx Series RM850x (2021) 850W Full Modular 80 Plus Gold" and was bought last year. The bios version is shown to be FB. And according to Gigabyte there are newer versions. Should I update to the latest?

I will also try your suggestions and post a reply. Thanks.

 

[SkyNetRising]

Besides the hdmi adapter being the issue, any thoughts on what might be causing this?

That would be my prime suspect. Failing HDMI to VGA adapter.

What is model name of your monitor?
Does it have any other video inputs than D-SUB ?

Could be also failing/overheating graphics card.
Check gpu temperatures.

 

[argitis]

What is model name of your monitor?

It's an old LG 22M38A-B. In the system settings it's displayed as LG FULL HD.

Does it have any other video inputs than D-SUB ?

No. Only D-SUB.

Could be also failing/overheating graphics card.
Check gpu temperatures.

While gaming, it peaked at 82.8 °C and while in idle it peaked at 49 °C

 

[SkyNetRising]

While gaming, it peaked at 82.8 °C and while in idle it peaked at 49 °C

82C is rather hot.
What's the cooling situation there?
What pc case? Does it have mesh front?
How many pc case fans?
What is ambient room temperature?

Can you show a photo of your system with side panel removed?
(upload to imgur.com and post link)

 

[argitis]

82C is rather hot.
What's the cooling situation there?

The cpu is cooled by an "Arctic Freezer 34 eSports Duo". The pc is located on top of a desk and has nothing to block the airflow (only from the right side of the case).

What pc case? Does it have mesh front?

The case is "Focus 2" from Fractal. It has a front mesh with 2x 140 mm fans.

How many pc case fans?

There is one additional "Arctic P12 PWM PST Case Fan 120mm" right above the gpu in the back of the case. I'm currently waiting for 2 more fans (the same ones) that I want to add on top of the case.

What is ambient room temperature?

I think it's around 30 °C to 35 °C at times.

Can you show a photo of your system with side panel removed?
(upload to imgur.com and post link)

I will upload a photo as soon as I possibly can (in a couple of days, because I'll be out of town for a few days). Thanks again for the response.