Let me apologize ahead of time for knowing so little about electronics.

About 7-9 months ago, my 2600 worked apart from a busted controller port. Now, the TV doesn't register that I've turned on my Atari at all when I flip the power switch.

I'm thinking that I should start by testing my 2600's AC adapter with a multimeter to see if it is the reason the old girl doesn't want to fire up. How would I go about doing this? While not certain, I think the AC adapter is working because I left it plugged in for a while and it feels just barely perceptibly warm.

Dammit.

What would be a good next step if the power is indeed fine?