RCA STA-3900 AM/FM STEREO RECEIVER ....WAS PLAYING GOOD AND JUST SHUT OFF ,DON'T NOTHING LIGHT UP OR COME ON BUT THE POWER BUTTON......RESET DON;T EVEN WORK NOW.....WHAT COULD BE WRONG ?

SOURCE: RCA STA-3900 standby light on will not turn on

POWER SUPPLY BLOWN FUSE CAUSED FOR A BLOWN OUTPUT TRANSISTOR , DO YOU HAVE THE NUMBER OF THOSE TRANSISTORS??

SOURCE: I have a problem withmy

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.