I have been fixing a lot of TAC20 problems as of late. Of course, the problem is always centered around LON problems. I hate this system but we are stuck with it. I am curious if anyone out here has the HOST.NXE and LN.NXE files. I haven't had these fail just yet but I know it will happen. I do have access to the correct tools but even our local board repair shop doesn't have these files. Most of the time I get lucky and just have to replace a corroded L24 card of remake a RJ45 connector.