I noticed that when switching channels, it is black for nearly 10 seconds before showing the next channel. Is it doing that for anybody else?
Checked timing on a #625 this morning with a software L4.13 and it is the usual 3 seconds between channel changes.
Your 10 seconds if not involving satellite changing which would rule out any external switch changing is too long and requires investigation.
Start by doing a satellite receiver a/c cord removal from outlet for about 15 seconds.
During this period remove the Sat. In cables from back of Sat.Receiver.
Plug receiver back in to a/c outlet.
With Sat.In cables disconnected from back of receiver, do a Check Switch. When this is finished, re-install the two Sat.In cables and do another Check Switch.
When this is completed, change between channels and note time of black.
What is the down time?