Homemade guitar amplifier repair troubleshooting guide

My customer brought me a homemade guitar amp.
The main problem is that it has no sound.




First thing to do is check the speaker  using continuity
in my case the speaker is 8 ohms.


After checking the speaker.Good to know that
speaker is good
So based on my opinion the board maybe has a problem.


so I leave it to my cat.....C'mon garfield give it a try....

Just joking.....

After seeing the insides which is the placement of the parts.
It is  unusual. Not a good build .And not durable enough
to hold its board and components.What a risky build.

But its okay as long as I can repair it .By the way its not my
Guitar amp.


At fist i check the pre amp if it receives power.And ok its good
nothing to blame on power supply.



Next is the input of the pre amp.Checking if it has short circuit
or open ground.Applying glue gun on the wires to hold it.So no more
problems about the wires.

Checking the groundings Which solved the problem .The groundings of the
shielded wire from input is open .Hurray took me 10 minutes of troubleshooting

 So its coming back in action.....If you have
a question just send me a comments.good to hear your idea and opinion.....