Monitor issue or gpu?

[JMorgxn]

Hello,

This seems a bit of an odd one. Quite a long explanation too sorry. I have just received my pc from pcs. During set up I've come across an odd issue and can't quite tell whether it's a gpu issue or monitor issue, or maybe a compatibility issue.

I have 2 monitors. 1, benq el2870u and 1, gigabyte m27q. I began my set up with my Dp cable into my gigabyte monitor, and had a mb issue of 1 long beep and 3 short beeps, as well as the white qled on mb. But windows loaded up and completed set up. Updated all drivers and done any other windows updates that came along too. After a reset still the same thing. So switched to other monitor (benq) via Hdmi and was all fine, also tried the benq with Dp and was all fine. No beeps or light. Next tried Hdmi on the gigabyte monitor. Worked fine.

Seems to only be causing the issue with Dp to the gigabyte monitor, I have tried 2 different Dp cables too.

So could it be just a faulty Dp on the monitor? (although picture got through fine) or is there maybe a setting I need to check or update? Would any freesync/gsync conflict? Could it be to do with the fact its a 170hz monitor?

I'm just a bit confused as to why it would make my motherboard give the beeps and show a white qled light if it was a monitor issue.

Pc specs are.
COOLERMASTER MASTERBOX TD500 MESH ARGB GAMING CASE
Processor (CPU)
AMD Ryzen 9 5900X 12 Core CPU (3.7GHz-4.8GHz/70MB CACHE/AM4)
Motherboard
ASUS® ROG STRIX X570-F GAMING (USB 3.2 Gen 2, PCIe 4.0) - ARGB Ready!
Memory (RAM)
32GB Corsair VENGEANCE DDR4 3600MHz (4 x 8GB)
Graphics Card
10GB NVIDIA GEFORCE RTX 3080 - HDMI, DP, LHR
1st M.2 SSD Drive
1TB SAMSUNG 980 PRO M.2, PCIe NVMe (up to 7000MB/R, 5000MB/W)
1st M.2 SSD Drive
1TB SEAGATE FIRECUDA 520 GEN 4 PCIe NVMe (up to 5000MB/R, 4400MB/W)
Power Supply
CORSAIR 850W RMx SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET
Power Cable
1 x 1 Metre UK Power Cable (Kettle Lead)
Processor Cooling
Corsair H100i RGB PRO XT Hydro Series High Performance CPU Cooler
Thermal Paste
ARCTIC MX-4 EXTREME THERMAL CONDUCTIVITY COMPOUND
Extra Case Fans
1x 120mm Black Case Fan (configured to extract from rear/roof)
Sound Card
ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)
Network Card
10/100/1000 GIGABIT LAN PORT
USB/Thunderbolt Options
MIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS

 

[AgentCooper]

It’s most likely the classic and annoying AMD motherboard/monitor issue, if the monitor is switched off or on standby mode you’ll tend to get beeps or a non-starter.

I have to turn my monitor on and then switch on the PC within about five seconds or I get a red light on the motherboard and it doesn’t boot up. I don’t switch off my system very often because it’s such a pain.

 

[SpyderTracks]

Exactly as the agent describes.

What is is is that some new monitors send a constant return code to the computer on Display Port Pin 20 IIRC even when they're in standby to let the counter know it's there. Older monitors don't do that.

What Asus in their infinite wisdom have done is make that return code a requirement so if it doesn't get it because the monitor is in sleep and isn't sending it, the board will falsely assume that there's a GPU error and raise the related beep codes.

As @AgentCooper says, just power the monitor from sleep before booting the pc

 

[JMorgxn]

It’s most likely the classic and annoying AMD motherboard/monitor issue, if the monitor is switched off or on standby mode you’ll tend to get beeps or a non-starter.

I have to turn my monitor on and then switch on the PC within about five seconds or I get a red light on the motherboard and it doesn’t boot up. I don’t switch off my system very often because it’s such a pain.

Ahh, so if this is the case, is there no real worry if it does load up and displays picture even after the beeps and light?

 

[AgentCooper]

Thank you for the more technical explanation, @SpyderTracks! If anyone would have asked me why it happens I’d have had to do this…

…and then gone and done some furious Googling 👍

 

[AgentCooper]

Ahh, so if this is the case, is there no real worry if it does load up and displays picture even after the beeps and light?

You’re fine, buddy. No need to fret 🙂

 

[JMorgxn]

You’re fine, buddy. No need to fret 🙂

No problem, thanks for your help both @SpyderTracks