The servo amp has 2 large areas where it appears to be burned and 1 small area on the circuit board. It seems to have a slight smell like it might be burned. After reading some of the post I was wondering if it could be resoldered or should it be replaced as it appears to be burnt?

Since I purchased the servo from a salvage yard and do not know if the amp was burned prior to installing the servo, is it ok to install a new amp and test it first? Or will the new amp end up being burned instantly without an opportunity to even test to see if the servo is ok, making it necessary to replace both the servo and the amp again?

Thank you

Tony