08 stock radio/stereo dead power after I just pulled trim up

[kirkhings]

Edit: forgot to say I've been searching a lot on this, across Google and other Yaris forums, youtube videos, and threads here at yarisworld. I couldn't find anything that answered the power question I have. Most others involve loss of power to speakers or a "lockout" thing. I did all the homework I could think of before posting this and asking for help.

I've never had a non-stock car audio system in my life so I was going to get one for father's day. Until I priced the install costs from two shops. Hoping I can learn enough to do it myself, one piece at a time as I can afford it. Starting with deck.

I watched some youtube videos how to disassemble center trim and pull the blocky stereo/deck/radio unit out to look at the plugs in back. Looked easy enough, started at bottom trim below air controls, then side trim panels, then trim on dash that surrounds the instrument panel.

Started feeling confident I could handle this. I had trouble unplugging the center spot between air vents, it has hazard button, clock and ODO/trip control buttons. Didn't realize until later I could/should have separated that upper part from the stereo unit below.

While wondering what I was doing wrong not being able to separate that top part, from what the video showed, thought I'd turn on the stereo just to see it play while I held it a bit out of it's home.

No power! No flicker of power, no crackle or anything from speakers, nothing. I've been searching for a couple days now, pissed at myself for screwing up such a simple thing. Wife and kids aren't too happy with me either. I'm really embarrassed about this.

Horrible memory, short attention spans, and reduced problem-solving are a couple of my tumor/radiation gifts. I have a shirt that says "Thinking" with one of those software loading bars at halfway. Yep.

Here's the status:

• Air controls below the stereo still powered no problem.
• Hazard lights button, clock button, and trip/ODO buttons still work.
• I reassembled everything, same situation (power above and below but not to stereo/radio unit)
• Took apart, discovered I could separate vents etc from the trim, unplugged it, replugged it in, still powered no problem.
• Radio: the 3 block plugs were firmly seated in place. I unplugged them but it was a little tough, they were definetly seated properly.
• Replugged in the radio, reassembled everything, same situation (no power to radio but power above and below.
• Tried the unplug negative battery terminal and pump brake 10 times, no change.
• Tested fuse (above left foot by the hood release latch, 7.5a ACC, next to the 10a cigarrette lighter amp. I don't know how to use my multimeter but searched and tested for continuity (long annoying beeeeeeeeeeeeep).
• I don't know which of the plugs (blue block, white rectagle block, white long skinny rectangle block) is power vs. data. I took a klein tool pen voltage tester (nose lights up), pressed it up against all 3 plugs and around them. Beeped once on middle plug but didn't anymore. Thinking power may be cut off?
• I don't have an inverter or whatnot to test power is radio unit still works. I'm dreading going back to one of those stereo shops tomorrow for them to test the radio unit. Sheepishly explaining I couldn't afford them so I thought I'd fup my system over the weekend.

Any ideas? Please and thank you!