I answered this on another forum where you asked the same question. Here is a copy/paste of that answer...
This isn't the type of fix which is going to happen with the remote control I would expect. It may be that one of the control motors for the projector has gone bad, or is fouled up. If this is the case, you may need to send it in for repair, or attempt a repair on your own.
If trying a repair on your own, check out FixItFrank on YouTube for a ton of projector teardowns.
It may just require a thorough cleaning. It is coming up on 10 years old, and it has fans in it, so a thorough cleaning may be all that is necessary to get rid of all these years of dust build up which could be all that it needs. If it needs a new motor, then you may need to reach out to JVC.