Chosen Solution
I have a Panasonic TX-58DX700B TV which recently had the 10 flashing LED error. Following posts on here and other sites I replaced the Power board first but this did not fix the issue. I then the AV board and the TV powers up but the screen now has a dark band going from the bottom to the top just above the LED . The image is still visible, so I don’t think it’s a panel issue. Any ideas on what wouldcause this and how to fix would be greatly appreciated. Thanks, Stu.
@stumac1506 since you already replaced all the board the only other possibility is a bad backlight array. Bit of a PITA to replace but not impossible. Hardest part is usually finding the right backlight strips. Do a search based on the panel number listed on the label affixed to the back of the panel.
