[polinko90]

Originally Posted by vol.2

My first thought is that there could be more cracks. If there was one, how did it get cracked, and could it have caused something else you didn't notice. Sometimes cracks can be very hard to spot because the PCB can remain tightly in place due to screws or it could just be a partial crack and the rest of the PCB is holding the whole thing in place.

Additionally, the shop might have missed a trace, or bridged some of the repaired traces.

You need to go in with a loupe or a microscope and carefully inspect everything, and check all adjacent traces for continuity with a multimeter.

My next step would be to reflow all the solder on the whole input PCB. Those connectors, especially the SCART connectors, undergo a lot of stress, and the solder joints get broken. It is usually impossible to see that they are cold joints with a naked eye and requires a microscope to see. Reflowing has a decent chance of fixing the problem.

If that all checks out, you need to pull the other boards and inspect them all for damage.

Also possibly the cracked traces messed up something and when it was turned on, it caused something to blow up. Sometimes a missing voltage can mean death to some part or another.

Then it gets harder. You need to check voltages against values in the service manual to find a incorrect spot and hope you find one. They when you find something wrong, you have to reason why it is wrong, which can be tricky; it involves basically decoding the circuit to understand what's happening.

Hi, thank you for taking the time to reply. This definitely helps me out and gives me a general idea of where to look.