Any time we get rain, winds or other weather phenomena in San Diego, cable boxes all over town go haywire. No need to get bent out of shape as we've got the fix. If your TV exhibits the following behavior:
1) You have picture but no sound or sound with no picture.
2) Your GUIDE stops working.
3) Your channel up/down don't work.
4) The cable box shows half an information bar at the bottom of the screen instead of a full one.
Here is the fix. Simply UNPLUG your cable box from the power, wait about 30 seconds and then plug it back in. Once it reboots, you should have your TV back! As you are looking at the cable box the power plug is the plug on the left side of the box about 1.5" away from the edge.
Keep in mind that these problems typically happen around weather events so when a storm is coming in (like right now), keep this information in mind.