PLEASE HELP!!! Just added the 976 to my system. When I fire up the system, I get the loudest, screeching sound through just the right channel speaker. It lasts about 2 seconds (just enough to sound like it damaged my speakers) then it stops but leaves behind an annoying hum (only in the right front channel). At first I thought it could be a bad trigger cable so I removed and still the same horrible screech.

Process of elimination:
1. Checked speaker wire connection (all good)
2. Removed 7700 from the Panamax and plugged into the wall (same result)
***mind you each time I'm having to turn on the system only to hear this noise, then turning off fast as I can***
3. Removed the 976 from the Panamax and plugged directly into the wall (same result)
4. Tried a different (known good) interconnect between the 976 and 7700 (same result)

Another issue - I'm connected from my 4k TVs ARC port to ARC port of the 976. The processors is receiving the TV information because I get a picture but no sound.

I pray this isn't a sign of needing another AMP.
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SAMSUNG 85” Q7-Series 4K Ultra HDR QLED TV
Outlaw 7700
Outlaw 976
Martin Logan Impression ESL 11A - L/R Front
Martin Logan ElectroMotion ESL - C
4 Martin Logan Edge In-Wall 7.1 Surround
Martin Logan BalancedForce 210 (Sub)
Oppo BDP-105 - (Limited Music Play)
Plex Media Server (All 4k/UHD, Blu-Ray Content, Music Library, LiveTV)
1 Panamax Max 5400 Power Conditioner (for electronics)
3 Furman M-10X E Power Conditioners (Front R/L, Center Martin Logans)
Outlaw Audio PCA Interconnects
Blue Jean BJC 12 White Speaker Cable
AcoustiMat Sound panels and bass traps