I have DELL precision T5600 with dual CPUs and 64 GB RAM (16x4). The machine is blinking numbers 3 & 4, while the power button in solid orange. I read the documentation and it says the problem is related to memory. I replaced the memory and still have this error.
Solid orange power button = Boot Failure : This is a system fault error condition, including the power supply. Only the +5VSB rail on the power supply is working correctly.
speedstep
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Posted June 8th, 2020 04:00
https://www.dell.com/support/article/en-us/sln265594/power-button-led-status-on-precision-t3600-t5600-t7600-systems?lang=en
Solid orange power button = Boot Failure :
This is a system fault error condition, including the power supply.
Only the +5VSB rail on the power supply is working correctly.