Unexpected shutdown and CMOS issues on Beelink MINI S

NickP

Dear Beelink Support,

I am experiencing a serious issue with my Beelink MIN S mini PC.

While the system is powered on and running normally on windows 11 pro, it suddenly shuts down without warning. When this happens, the monitor goes black and all peripheral devices (USB ports, keyboard LEDs, etc.) turn off. However, the blue front power LED remains lit.

At this point, the system becomes completely unresponsive — it cannot be turned on again unless I physically unplug the power cable, wait a few seconds, and then plug it back in and press the red power button. Only then does the device boot up again.

Additionally, I noticed that the system loses the time after this forced shutdown. Although it eventually recovers the correct time automatically, this suggests a possible CMOS battery or RTC issue.

Here is a summary of the symptoms:

Sudden shutdown while the system is running

Front power LED stays on, rear ports go dark

System only recovers after unplugging and replugging the power adapter

Loses system clock (only and not date) temporarily on reboot

Please advise on how to proceed. If this is a know-how straightforward issue , I would appreciate your guidance.

Thank you in advance.

Best regards,
NickP

[Serial Number B50952CG40245]

support1

NickP Sorry for the trouble.
Here are some potential solutions：

①Please take out the RAM ,please clean the contacts of the RAM with a rubber. Here is the tutorial https://mega.nz/file/XqZX0TIR#_DtO2oa4aRP4bWtvxgKLj4QGhBpQ959cg5U3Yw4u1Cc or [https://url.bee-link.cn/AzzB]

②Please take out one RAM and leave the other one in it to test if the RAM is defective or not.** You can also use Memtest software to test the RAM.

③Please repeatedly press delete key as soon as you turn on the PC, go to BIOS. Please send us a picture of the Main page, we will check if you need to update the BIOS.

④Please change another power supply.

⑤Overheating. If your PC is overheating, please check if the fan spins. You can also turn off the turbo boost. Go to control panel —power option—change to High performance— change plan setting—advanced setting —processor power management— change both 100% to 99% , click save.

⑥Update graphics driver: Please uninstall the graphic driver in the device manager and install the new one. Here is the driver source :https://url.bee-link.cn/OAQN

NickP

Dear support

thank you very much for the information and for your guidance.

I have proceeded to all the checks you mentioned above, temperatures are still at normal levels.

I am also sending you the bios version that I have on this particular beelink mini pc

Image description

NickP

Dear Beelink Support,

For your information i would like to report a serious hardware issue also that i have found.

The system shuts down unexpectedly while running MemTest86, always at exactly 58% progress. I have tested this multiple times using two different RAM modules from different brands and specifications. Despite the memory being different, the system crashes at the exact same point during the test each time.

Here are the key symptoms:

The system shuts down instantly (no blue screen or error, just a black screen).

The front power LED stays on, but all rear ports and USB devices turn off.

The system does not respond to the power button unless I physically unplug the power adapter and plug it back in.

After rebooting, the system clock is reset or shows the wrong time temporarily, which later corrects itself.

I have ruled out faulty RAM as the cause, which leads me to suspect a fault with the motherboard, the CPU’s memory controller, or power delivery circuitry.

The fact that the system always shuts down at the same point in a memory stress test suggests that there is an issue with handling high memory load or voltage instability.

Thank you in advance for your assistance.

Best regards,
NickP

support1

Hi there,

① The clock reset points directly to CMOS/RTC failure. Replace the CR2032 battery (even if voltage seems normal).
②Your BIOS is the latest one.
③ If the problem persists after you replace the cmos battery, we suggest you send the item back for repair.

GlenB

My Beelink U59 has just developed the same problem. Did changing the CR2032 battery fix it?

support1

GlenB Maybe. You can try to replace the battery.

Karbo

I had the same issue with mine, tried everything from replacinhg the cmos battery, swapping ram, os re install and updating bios. Nothing worked. I found that the problem had something to do with some component heating up and I pinned it down to ram. at this point there were only 2 option, the first would be to use a thermal camera to see witch board componant was heating up and the second would be to undervolt the ram. I went with the second one and so far the issue has been resolved.
The second option is not a perfect solution because the fault component is istill in the board but if you do not have acces to the equipament to change the equipament it will work,