u/Golge_Kirmizi7463

I am writing regarding a critical issue with my MSI MAG X870E Tomahawk WiFi motherboard that started spontaneously overnight without any hardware changes or interference.

SYSTEM SPECS:

- Motherboard: MSI MAG X870E Tomahawk WiFi

- GPU: PNY GeForce RTX 5070 Ti

- PSU: MSI MAG A850GL PCIE5 850W

- RAM: 2x sticks (running single channel as workaround)

ISSUE DESCRIPTION:

The system started failing to boot with a 0D POST code (CPU initialization failure), fans spinning for 1 second then stopping, and no display output. This happened overnight with no hardware changes made.

STEPS ALREADY TAKEN:

- Cleared CMOS multiple times (both battery removal and rear I/O button)

- Reflashed BIOS twice using the Flash BIOS button with MSI.ROM on FAT32 USB

- Tested RAM individually in all slots — single stick in B2 temporarily resolved the issue

- System worked briefly then failed again overnight returning to 0D/C5 codes

- Reseated all power connectors

CURRENT BEHAVIOR:

- System intermittently shows 0D (CPU init failure) or C5 (memory training failure)

- Symptoms return after the system cools down overnight

- CMOS clear temporarily moves it from 0D to C5

- No display output at any point

- Both CPU and RAM diagnostic LEDs light up simultaneously

Given that the PSU is an MSI MAG A850GL which is more than sufficient for this build, and all software/firmware solutions have been exhausted, I believe there is a hardware defect with the motherboard. The intermittent nature and overnight failures without any interference strongly suggest a hardware fault.

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I'm getting red and yellow debug lights and an error code C5. The PC was working fine yesterday. I built it about 10 months ago. Today, I got a 0d error code when I woke up. I tried resetting the CMOS, but then it turned into C5. I don't have a display, but the fans and RGB are working fine. What's the reason it suddenly broke without any warning?

I'm getting red and yellow debug lights and an error code C5. The PC was working fine yesterday. I built it about 10 months ago. Today, I got a 0d error code when I woke up. I tried resetting the CMOS, but then it turned into C5. I don't have a display, but the fans and RGB are working fine. What's the reason it suddenly broke without any warning?

I just woke up and started my pc and it was like this. Fans start for 1 second and turn off, motherboard is msi x870e tomahawk wifi. Please help. Also the motherboard shows a weird error code like 0d