I have a issue with this tuner. sch2p

I had this working for full year. Manager from restaurant called us that Sirius is not working.
I went there and tuner showing no signal.
when I switched dip switch to pos 3 I'm getting signal and sound.
I assumed something happens to tuner.
I got new one today. same thing when on pos 3 its fine when on dip 1 no signal and no sound.

any ideas how to fix it. ??