Optiplex 7010 MT flashing amber light, won't turn on

The following forum posts should help.

https://www.dell.com/community/Desktops-General-Read-Only/Optiplex-7010-Flashing-orange-power-button/td-p/4041692

Thanks, I figured it out using this excellent video which allows you to test out power related "blinking" issues:

 https://www.youtube.com/watch?v=udGOe7LQJEI

I had a loose cable to power the CPU that must have jiggled loose as I installed the SSD.  I did try the RAM trick first that you linked to, apparently that's a fairly common one as well causing the same thing.  I'm literally celebrating that it was this easy, I thought I blew something up!  All good now and SSD installed.  Success!

Mine has been working fine for 3 years, now all of a sudden was flashing 2-3, which the manual says is "system board, memory or CPU failure."  I did as some here have suggested of a) replacing the CMOS battery, and b) rearranging all of the memory into the opposite slots.

Turned back on and it is working again, so far so good.  Weird, have no idea why this worked, but appreciate the good advice here.

If the power light is blinking amber, the computer is receiving electrical power, but an internal power problem may exist. Ensure that the voltage selection switch is set to match the AC power at your location, if applicable. Ensure that the processor power cable is securely connected to the system board.

Regards,
John