only sorta OT: did I blow a radio?

[Hal]

I recently scored a car radio for free, and hoped to hook it up in my basement by my workbench....so I pulled out a computer power supply I had, finally got that powered up and reading 12v.  So I plugged in power to the radio, and the clock display went on for a couple of seconds, then went off, and won't power up again.  The power supply still reads 12v.

Now I realize that car radios expect unregulated power, but I thought this should work.  I hooked up a 12v, unregulated wall wart to it, and got absolutely nothing....

Most of the circuit is kept at potential, runing a meter probe across the boards.  The speaker outs read +12v with respect to ground...

Sorry to post here, but Its actually about electronics, and I want people to see it.  If its too off topic, I'll delete and repost at the lounge.

[Paul Perry (Frostwave)]

The speaker outs read +12v with respect to ground...
.

That is a very bad sign  

[Hal]

I've been thinking about it a little more - is it possible to have blown something becuase no speakers were connected?  The only reason i dont think this is the case is that the radio was in the "off" position...It should only have been clock and whatnot, with no audio playing.

[niftydog]

solid state devices are usually fine when no speakers are connected. In fact, you're probably lucky, as 12VDC on a speaker might have blown it as well!