09-28-2024 09:13 PM
Now I got my 3rd PG32UCDM and all 3 had the same issue and were needed to send back. I guess every of your PG32UCDM has this issue (tested with MCM103 and MCM105):
While in Power Saving mode the USB-A and USB-C ports (maybe USB-B as well) will be turned off and and the monitor starts coil whining after turning the monitor off. Pressing the power button one time will turn everything on again including the screen.
While in Standard Mode the USB-A and USB-C ports (maybe USB-B as well) will be turned off and and the monitor starts coil whining after turning the monitor off AND pressing the power button one more time (screen stays black). In Standard Mode I need to press the power button a 2nd time to turn everything on again.
In all scenarios the USB Hub was "On During Standby", but this doesn't matter because the problem also exists if it is changed to "Off During Standby". So it seems that in this "No-USB-Coil_Whine"-state there is a short circuit which produces a heavy load for the voltage converters so they start coil whining. Also while short-circuited the USB-ports have no voltage. But that's only speculation.
I made a video of this issues:
https://www.youtube.com/watch?v=UwSVNtMKJAU
10-03-2024 08:17 PM
Hi @Fuchstraum ,
To better assist you in resolving the coil whine issue, we would like to gather some more information:
Providing this information will help us locate the problem more quickly.
Thank you.
Earlier before we have conducted a thorough investigation into this matter.
Our testing results are as follows:
10-04-2024 03:04 AM
Remember the problem isn't only the coil whine but also the shut down of the usb ports while the coil whine issue occurs. But to your questions:
1. In power saving mode it occours in both cases, in standby mode and when I turned off the monitor.
2. The coil whine occours in both modes:
In power saving mode after I turned off the monitor with pressing the power button 2 times or in standby mode after I turned off my computer (power LED is off).
In standard mode after I turned off the monitor with pressing the power button 2 times and press the power button a third time. But not in standby mode (power LED is orange).
3. I tried to make an RMA, but Asus told me I had to sent it to my shop. So there is no RMA number from Asus. The shop were to stupid to recognize the failure and sent it back to me.
4. I downloaded the youtube video I've provided before and converted it into a mp4-file. What should I do with the mp4-File? Where should I send it to?
5. It comes definitely from the monitor. I can reproduce it with any other and also even without any hardware.
6. PC-Hardware doesn't matter, I can use my Raspberry Pi 5 8G (HDMI), Galaxy S24 Ultra (USB-C) or my PC (DisplayPort):
Mainboard: B650M-A WIFI
CPU: Ryzen 7950X
GPU: Gainward Geforce RTX 4080 Phantom GS
Power Supply: BE QUIET DARK POWER PRO 12 1500W
OS: Windows 10
Monitor Firmware: MCM105
And to your testing results:
"Normal ranges" are not defined and subjective. For me who sleeps next to his PC it is to loud. For this price I expect no coil whine at all.
I've seen that some people got their monitor with a newer firmware MCM106, but it is not officially released. Maybe it is already fixed there, but you can't provide the download for now.