There is a wide variety of help available online. Attempt to narrow down what the individual problems are, and troubleshoot them one by one. Consulting an audio forum will help.
check the on/off switch is proper working. check the power going through components. find
the transistors/ic are good. check the speakres. check the out put transformer.
Check first connectors of all kinds, power line, speakers, other input devices. Then check if there is propper light indicator operating when turned on. Check switches and controls.
The most common failure of a class-AB audio amplifier is a shorted output transistor. You can Locate the protection relay (if there is one), and measure the voltage "before" it, with no input. If there is DC voltage, one of the output transistors is probably shorted.
When it comes to power if it is not working, there is not much to be done for troubleshooting. Turn off, wait, then turn on. Fix? Check manual for indicators. Check fuses and cables/ cords. There is no point in opening the unit. You will most likely shock yourself. Don't.
The most common solutions to amplifies problems would be switches in the wrong position, blown fuses, speaker wires touching adjacent terminals, dirty input connectors, or broken wires.
Firstly i would require you to remove all the wires except the power cable.Then switch it on, Insert the jacks one by one into the amp and see if the problem still persist.If it does try it on another amp,maybe it could your equipment.
