There Are Numerous Debug LED Error Messages on the Motherboard
There Are Numerous Debug LED Error Messages on the Motherboard
Hey everyone, I'm going to explain the issue I'm facing and hope I can find a solution. Your feedback and suggestions are really helpful. I understand it might be long, but please make sure you read through it carefully.
I own a PC with these specifications:
- i5 2400 processor
- GTX 1050 Ti graphics card
- 8 GB RAM at 1333 MHz (2x4)
- Foxconn P67A BIOS from AMI
There was a power outage a few days ago while I was working on the computer. After it came back on, every time I turn it on, I see the error code B7 on the debug LED.
I searched online but couldn't find an exact match because the Foxconn website is down or something. I read that this might be related to a RAM issue.
I tried installing one RAM stick in all four slots, and the same error appeared. But it's unlikely all four slots failed at once. I removed every RAM stick and the error changed to 55, which suggests no RAM was detected.
So I suspect either the CPU or the RAM sticks themselves might be faulty.
Later, I got a different CPU, an i5 3470, with two RAM sticks (2x2). The BIOS is updated, and the motherboard supports this CPU.
Here’s what I tried in each situation:
1. Old CPU + 1 new RAM stick → Error B7 then 59.
2. Old CPU + 2 new RAM sticks → Error B7.
3. New CPU + 1 old RAM stick → Error 95, with 2 old RAMs showing B7.
4. New CPU + 1 new RAM stick → Error 99 (remembered as a success code, but now it's 66 or something, not sure), with 2 new RAMs showing B7.
5. I also reset the CMOS multiple times, tried without a GPU, switched the GPU slot, even used a GT2100, but nothing changed.
The CPU pins look fine. Is my motherboard still working?
after passing B7, bios nvram was restarted successfully. code 59 indicates the CPU microcode wasn't found, meaning no support for that CPU with the current bios. however, since it moved forward, it likely froze during a post-reset. code 95 relates to pci resources and memory issues. it's possible your mainboard is damaged. skipping b7 uses only cmos reset code. all other codes suggest hardware initialization failure. the power supply or mainboard may still be compromised.
Your motherboard could be defective. Even after using various CPUs and RAM modules, ongoing error messages suggest a possible problem. Make sure all connections are tight, switch to a different power supply unit, and refer to the motherboard's guide for detailed error codes. If the issue continues, think about swapping out the motherboard itself.
code 59 appeared with the older CPU, functioning properly before any BIOS updates. The error persists, indicating the BIOS doesn't recognize it.
firmware (bios) requires the cpu to function, cpu needs ram to operate.
if firmware becomes stuck, the code displays its activity until it reaches the issue.
code59 is the cpu microcode that loads the cpu; if it fails to execute, it may be due to missing microcode or cpu failure, possibly linked to memory or cpu errors.
both cpus and their corresponding rams are showing low-level hardware initialization failures.
at this stage, replace the mainboard.