@Joe_90 - Yes (I think so), it is scanning all the transponders but finds only channels att one (1) transponder.

@abu baniaz - Here follows the hardware:
VU+ Solo2
A single universal LNB
No Diseq switches
I don't know what Face Plates are
F-plugs look ok and I get these 23 channels clear.
Failing PSU sounds as a possibility. I don't have another 12V PSU, but I can measure the PSU output while it is scanning. If it has issues the voltage should drop below 12V.

For Solo2, to use internal loop through, the signal wire must be hooked up to Tuner B
I did not know that. Then I will move the coax back to Tuner B and change the tuner settings.


Thanks for your help! I will test the PSU this evening.