Error messages about CPU fan and overvoltage appear inconsistent on the monitor.

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bicefale
Junior Member

4

11-08-2019, 11:13 AM

#1

Hello everyone, I attempted to replace the thermal paste on my CPU today and accidentally spilled some onto the side of the golden pins at the back. I made sure to clean it up afterward. However, the problem persists: when I power on the PC, it displays CPU Fan Error and overvoltage warnings, and the BIOS screen shows unusual readings. I tried booting through the boot menu and opened HW Monitor, but the displayed values seem inconsistent. After switching to ignore voltage values in the motherboard settings, each boot now reports a new CPU detection. I’ve had to repeatedly go through the BIOS boot menu. I also tested using different CMOS batteries, checked the PSU voltage with a multimeter (12V, 5V, 3V all seem stable), and even updated the BIOS. Still, the issue remains. I suspect it might be related to a dead CMOS battery, but since changes are saved in BIOS, that doesn’t seem likely. The BIOS is reporting motherboard and CPU temperatures at -1°C, which is odd. It also fails to detect the CPU fan at all, and the voltages shown on HW Monitor don’t match. What’s going on? Is it safe to keep using the PC as it is? On HW Monitor, the maximum VDD reaches 1.469V, then drops back to 1.000V and cycles. This pattern seems unusual. Some online users mention a max of 1.35V only during overclocking. Can you clarify this? I’m really worried about this situation. Here are my specifications for reference:
- Asus TUF Gaming 750W power supply
- ASUS Prime B450 M-A II Ryzen 5 3600X
- Crucial 8GB DDR4 3200MHz memory
- Gigabyte GTX 970 4GB
- WindForce cooling solution

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_RGamer_
Member

53

11-09-2019, 07:54 AM

#2

I sourced the thermal paste from a specialized electronics supplier. It was a high-performance silicone-based formula designed for precision applications.

R

RedSeNpai
Junior Member

12

11-09-2019, 10:45 AM

#3

Purchased CPU cooling compound from a retail store.

T

TheBigOcean
Junior Member

5

11-09-2019, 04:43 PM

#4

The exact type of thermal paste used isn't specified, but it's likely a high-performance silicone-based variant. As for its placement, I assumed it was applied to the CPU or GPU heat sinks in the computer.

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bear7001
Senior Member

448

11-09-2019, 10:01 PM

#5

It barely made contact with the golden pins at the back of the CPU, yet I still cleaned it thoroughly.

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HarriJuji
Junior Member

13

11-10-2019, 04:24 PM

#6

Check the BIOS settings for temperature and voltage readings, even though the system appears to be operating normally in Windows.

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PaigeOfTheBook
Senior Member

733

11-11-2019, 06:57 PM

#7

The temperatures remain consistent. I accessed the BIOS each time it restarts, seeing the same message about a new CPU. It only allows entering Windows through the BIOS by pressing F8 and selecting my Windows SSD. Right now, after hours of use and some gaming, everything feels normal except for the BIOS behavior which seems erratic.

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Cyanstrophic
Senior Member

668

11-12-2019, 12:15 AM

#8

Reset the system by cutting power (disconnect or shut off the supply). Hold the power button until the CMOS battery drains completely, then remove it.

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timo_1892
Senior Member

715

11-12-2019, 01:54 AM

#9

You've already tested clearing the CMOS via the jumper and used various CR2032 CMOS batteries without success.

J

Juan2610
Posting Freak

875

11-12-2019, 11:17 AM

#10

I followed the steps you described. The jumper technique can be effective, though its reliability depends on your specific situation. Since I’m new to this method, I’m still assessing its consistency compared to fully disconnecting the power source.