I think my osmio 4K plus has a bad S2x tuner. Tuner A seems to fail to output voltage. I’m using Open PLi 8.3. I can unplug the unit for a while and plug it back in and it will work a while. If I turn it off and turn it back on later I get the no signal error. Tuner B S2 seems to work fine! Any ideas? Can the tuner be replaced?? Thanks!