Won't Start, Kills All Power Temporarily - 00 Launch

[h2o-ski]

That sounds like a dead battery. I just replaced a battery that was outputting 12.3v but would not turn over the engine. On the flip side, I had a bad connection on my battery and was only getting 10.4v at the starter but the starter would still turn the engine over.

[MySupra]

Tracetrimble, were you able to trace the problem?

You mentioned the solenoid, but have you checked tightness of the cables on the starter and the ground (i.e., where both cables land when they leave the battery)? You have to pull on them to confirm, as vibration can loosen them, causing them to mimic a bad battery.

Of course, it could just be your battery, as wise h20-ski suggested.
MySupra