Although the photo in post #1 looks like a board failure that requires a board replacement, it might also be caused by an internal cable bad contact - this is what I had with an old Samsung monitor.
Kharma S7
Nac 202 Nap 200 DR Hi cap dr
Naim cd5xs
SC:super Lumina
IC:Venture Chloe, WW Platinum
PC:Siltech SPX800,Nordost Heimdall 2,WW Platinum
USB:AQ Diamond