Repair reliability testing

[xJAyx]

I'm working on a fairly simple ignition style circuit which contains caps diodes, resistors, pots, a 555 timer and a darlington pair transistor.
Repairs are usually simple things like replacing burned out diodes or a burned off trace.
I have a test rig for the whole circuit which is basically a go/no go tester but can be used to run the board for an extended time. I am concerned about post repair field failures and I am wondering if there is some way to test the additional components for partial damage. Also looking for tips on testing the whole circuit for long term reliability.

Thanks in advance.

 

[Chuckles159]

If you are concerned about this and the circuit is that simple, do not repair any units needing components replaced. Replace the entire board assembly. Besides, the cost of repair probably exceeds cost of replacement anyway. Why do you think so much stuff is throwaway nowadays?