30" cinema dead: power brick, graphics card, or other problem?

so, everything was going fine, then I hear a power surge beep through my Ups, and my apple 30" display goes black. checked all connections, plugged in a spare monitor. checked and changed power connections, and all other advice from initial troubleshooting. computer seems ok, it shows both the apple cinema display and other monitor are active in the system preferences. but the power brick is cold, and no power is getting to the cinema display.
What are my next steps to see if my power brick has failed or some other problem has arrived?
Thanks in advance.

Determined that one of my internal harddrives p**ped out at the same time. This may indicate a power surge ran through the machine. Apple hardware test hasn't been able to complete testing, it locks up after a few minutes.
I know these monitors and in the under $500 range nowadays, but it has been such an awesome monitor, I would hate to see it die.
How to determine what is wrong with the monitor?

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