Go to Menu 6,1,3 and see if any of the boxes get a red X. If so, go to details and see if it reports an LNB drift on 61.5. If so, time to replace the LNB.
Do your locals come in on 61.5? If so, tune to one of the locals and then bring up your signal strength screen via menu 6,1,1. Should be a pretty strong signal. If not, you might need to peak it up a bit. Do that by having a helper watch your satellite meter while talking to you at the dish on a phone. Make small adjustments, giving a few seconds each time for the meter to reflect the change. This is the time to work slow.
Another possibility is that the 61.5 LNB has failed, possibly only affecting a few transponders. To test for this, in your set up, you would want to take a dual LNB off of either your 119 or 110 and swap it with 61.5 to see if you get those channels back. If you do, order up a replacement LNB.