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February 14th, 2022 00:00
How to resolve PE T710 motherboard voltage errors
This Dell T710 would not power on, giving three motherboard voltage errors: failsafe voltage, CPU2 VTT regulator voltage, and memory regulator voltage.
To isolate the cause I eventually got power up by removing both CPU2 and the three memory modules linked to this CPU - B1, B2, and B3. The machine is now running fine with CPU1 and the three memory modules linked to that CPU.
I first tried just removing the DIMMs B1, B2 and B3 but it still threw the same errors. When I removed CPU2 as well as the memory then it powered up.
My question is how can I further isolate the issue and know what to replace. Is it the motherboard, the CPU or one of the memory modules?
As far as I understand, there is no point trying to put DIMMs B1, B2 and B3 back in as they will not do anything without CPU2 fitted on the board.
Is there any way to test the memory modules and the CPU? Is it more likely to be those or the board? Basically, how to I proceed from here to know what I need to replace?
garcilasoinca
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February 14th, 2022 01:00
Thank you DELL-Shine K. I wasn't sure whether the CPUs and the memory were interchangeable like that. This will be a good way to isolate if it is the CPU or one of the modules rather than the CPU seat or module receptors on the board.
Not sure if anyone is able to show exactly where I might probe on the board around the CPU seat and the memory modules for shorts or other voltage issues. I have no idea where I might use the multimeter to check voltages there. That way I may be able to diagnose whether it is the board that is causing the problem.
DELL-Shine K
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February 14th, 2022 01:00
Yes. Installing memory on B1, B2 and B3 without CPU 2 will not do anything.
You can install Memory module from B1,B2 and B3 on A1, A2 and A3 to see whether DIMM have any issues. Similarly you can swap CPU 1 with CPU 2 to check whether CPU 2 have any issue.