the power light came on, but nothing came out of the speakers. not even the usual hum i usually got if i turned the volume to 100% with no input connected.
the amp was only £10 from ebay, so i went ahead and ordered another one. but it would take a week to arrive! so i decided to crack open the old one and see if anything could be done to fix it.
i know nothing about amps so i wasn't too hopeful, but thought i may as well have a look as it may be as simple as a blown fuse or something...
Step 1: Have a Look.
unsure what a relay in an amplifier was for, i looked on the underside of the board to see what it was connected to.
i discovered the relay was in line with the ground of the speaker outputs, meaning that the relay has to switch for the speakers to receive the audio signal.
i plugged the power, audio input, and speaker output back into the amp, and placed a bit of wire to bypass the relay which worked!
then al i had to do was solder a permanent bypass wire and the amp was all working again.
no idea what the relay was for. i guess maybe some sort of output protection, but as i'm using an old speaker which can be easily replaced with another from the loft, i don't mind loosing output protection.
Step 2: Try It Yourself.
just goes to show, you never know what you can do if you don't try, always open things up and have a look before you chuck them!
hope this short post inspires others to try and fix broken things.