I have a replacement Slingbox Solo and now can not select a remote that works. My Satellite receiver is a Bell ExpressVu 4100. I do not remember having trouble getting the correct remote for the original Slingbox Solo. I tried a few other remote e.g. 5100 etc. , but none work.
If there is a work around, please let me know.
Sling suport suggest that the IR cable is bad and are sending me a new one.
I assume you have already done a proper Forum Search for your model number in case other people have already answered your question ?
If so and that didn't help then check out this thread: https://community.sling.com/thread/3300?tstart=0
Come back if it that doesn't help either.