http://www.dell.com/support/Manuals/us/en/19/Product/precision-470Click on -
Dell Precision Workstation 470 and 670 Computer User's Guide
In the list on the right side, click on - Tools to Help Solve Problems
In the list on the left side, click on - Diagnostic Lights
Yellow (A) Green (B) Yellow (C)
"A possible VRM 1 failure has occurred"
VRM stands for Voltage Regulator Module.
It regulates Voltage for the Processor.
The Processor MUST have a steady, 'clean', supply of Voltage; and it MUST be kept within the tight voltage range, for the Processor.
Too little, or too much; and the Processor turns off. (BIOS turns it off)
Your motherboard supports two Processors.
1) Processor (CPU_0) Zero which is in the middle of the motherboard, next to the PCI Express x16 slot;
2) and Processor (CPU_1) One, which is next to it.
The VRM 1 has failed. Needs to be replaced.
http://www.ebay.com/itm/DELL-H2703-PRECISION-470-670-VRM-VOLTAGE-REGULATOR-MODULE-TH-0H2703-WS470-WS670-/380369885440VRM's used are interchangeable.
IMHO you can remove Processor 1 (CPU_1), and it's VRM, and still use the computer; albiet slower though.
For additional questions please post in a Comment.
Regards,
joecoolvette
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