dell t5600 blinking led 3 - 4

Question

My dell Precission T5600 diagnostic LED 3 & 4 imideatly blink after i plug ac power chord. Did anyone know what causing this problem??  When i measure Ram and CPU voltage i got Zero Volt,.. is bios problem or Regulator Problem. Please help me.  Thanks and sorry for my english

Gassanov · Answer

Ok here's what i deed.

1. Remove all memory modul and install it one by one.

2. Swap the processor and use only one processor at a time.

3. Measuring CPU Voltage on Ran and CPU i got ZERO Volt.

4. Remove All Pcie Card and Video card.

5.Remove Bios Chip and read the bios using MINiPro Programmer.

Any sugestion??

fireberd · Answer

From the manual for LED's 3 and 4

If it isn't memory, I would suspect power supply

Memory modules are detected, but a

memory power failure has occurred.

•

If two or more memory modules

are installed, remove the modules,

then reinstall one module and re-

start the computer. If the

computer starts normally,

continue to install additional

memory modules (one at a time)

until you have identified a faulty

module or reinstalled all modules

without error. If only one memory

fireberd · Answer

I would suspect the power supply.  Unfortunately the only true way to test is to replace it with a know good power supply.

Precision Fixed Workstations

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