I have a new DCC equipped F7A to replace one that recently broke.  It ran sporadically when I first got it on a layout which had given me no previous problems.  Current was going to all sections.

Got out some older track and ran the loco on it for awhile.  Looked like it was broken in, but back on the layout it won't run.  Tried it back on the other track with no luck.  Cleaned all track.  No go.

Occasionally, the headlight will come on, but never fully.  Somehow juice is not getting to everything.  Are there some "fixes" which I can attempt?  I really liked my old F7 and hope this one will be just as faithful, but not running, it's just a doorstop!!

On the newer F7A diesel, is it possible to replace the DC board with a DCC board and, if so, are there any other modifications that need to be done to operate on DCC?