Anyone know how to diagnose a faulty PCB

[crazyhorse]

My cruise control waeco MS50 has suddenly stopped working.. it doesnt detect the signal from the tacho, tacho is still working so maybe something has gone wrong in the ‘brains’ of the controller..

They are silly money to buy, but rather than throw out i want to see if its something simple…

Anyone willing to have a look?

Thanks

[davidoft1]

It’s always worth looking at the board , quite often faults are visible

[TwinTurbo]

most likly culprits are dry joints or leaky electrolitic caps, without a schematixc it gets difficult