amp wont key or make any noise at all

[a train]

2 pill fat boy was working fine, fuse did not blow or did not see smoke. But there isn`t any modulation whatsoever, inside of box looks like new. Help!!!

 

[mackmobile43]

Could be many different things, start with checking the power switch which are not the best quality in these amp.

Check for power coming to the switch and on the output of the switch when it is in the on position.

 

[9C1Driver]

You will have to go through the simple things you can control. Check the radio and mic to make sure they are working. Try a different jumper. Make sure the amp is getting power and turns on. Check the radio settings. Once you eliminate everything else then you might have to send the amp in.

 

[Robb]

Keying transistor - perhaps?
Don't know much about amps yet . . .

 

[mackmobile43]

Interior pictures give many clues

 

[psycho]

Keying transistor - perhaps?
Don't know much about amps yet . . .

With those amps the keying circuit comes as an assembly and if it isn't making any noise that would be my first guess. 2nd would be a loose keying circuit connection at the relay or input SO239.
People asking questions without good descriptive info or pictures won't help at all.