T5610 can't startup

What color is the power button when it won't boot:

solid amber light — the computer does not start, indicating a problem with the system board or power supply.

blinking amber light — indicates a problem has occurred with the system board.

What diagnostic LED pattern do you see on the front next to the power button? Look up LED codes in the manual:

downloads.dell.com/.../precision-t5600_owner's manual_en-us.pdf

EDIT: Robert types faster than I do. :emotion-4:

Hi Weblyang,

Thanks for posting.

Here is some information you may find helpful:  http://dell.to/2xLYfLJ

http://dell.to/2xLZcn8

and on page 55 of the manual:  http://dell.to/2xM0WNm