Originally Posted by
Sicilian
Sounds like a signal issue, lnb, coax or F connectors.
Check each tuner scans the same services. Menu > Setup > Tuner Config > Manual Scan > Select Tuner A at top first, then set type of scan as Single Satellite. Scan on Tuner A, then Tuner B, see is same amount of services are found.
If they do, check each tuner individually, disable Tuner B, watch and record a couple of channels on Tuner A only. Then do the same with Tuner B disabling Tuner A. If they work ok individually could be an LNB issue.