Question Oldie but Goldie... With Strange

[trebor58]

Hello, I have a Dell M6400 that was working fine, then stopped (just died). I switched it back on, and it did not boot; instead, the No. 9 bag (Num Lock) led flashed 23 times and then remained on. According to the Dell Precision™ M6400 Service Manuals, it signifies a processor error.

So here is what I have tried so far.
1) Removed and cleaned the CPU, reseated it, applied new thermal paste and retried and got the same error.
2) Purchased a replacement CPU, applied new thermal paste, and retried and got the same error.

Now, thinking this is not the processor, I purchased a replacement motherboard and tried both CPUs, but I still get the same error message.

So please, any suggestions...

 

[LordVile]

Hello, I have a Dell M6400 that was working fine, then stopped (just died). I switched it back on, and it did not boot; instead, the No. 9 bag (Num Lock) led flashed 23 times and then remained on. According to the Dell Precision™ M6400 Service Manuals, it signifies a processor error.

So here is what I have tried so far.
1) Removed and cleaned the CPU, reseated it, applied new thermal paste and retried and got the same error.
2) Purchased a replacement CPU, applied new thermal paste, and retried and got the same error.

Now, thinking this is not the processor, I purchased a replacement motherboard and tried both CPUs, but I still get the same error message.

So please, any suggestions...

Can I ask why you are trying to keep this going?

 

[trebor58]

Thank you, LordVille. for replying to my thread. I know they are old machines, but I refurbish them and then pass them on to others.

I should/could scrap this and sell it as parts, but it is intriguing me what is causing this strange error, which I why I posted the question here. Ho[ing that someone may have come across this issue in the past