OK, just seen your latest email - scrub the retest! New chip required, but the question is - why did it fail? The motor must be taking too much current at some stage thus blowing the chip and in this case taking the voltage rail track out too, a bit like a fuse. I suspect it must have been intact last time or your repair would not have worked. Hence I think this is a symptom of the latest failure rather than its cause.

I think I'd be checking my motor wiring for issues, because if there is a problem there, you'd potentially end up blowing whatever you connect - new drivers for example - until that is fixed!