Radio won't power on/shuts off randomly

[rockoman]

Hi,

 

So, a while ago, i installed my radio, and everything's been working great. Lately, however, the radio's been shutting off randomly. Sometimes, when i start the car, the radio doesn't even power up. I've taken the radio out and looked at the connections, all of which were still fine. i've disconnected everything and reconnected it, just in case something had gotten loose. None of these seem to have fixed the problem.

 

Any idea what's going on? I'd appreciate any help you guys can give me.