Hi all,
I found three plus options for diagnostic on my TV (D5500) with remote control.
If you need this, just push/release these buttons ~10-15 seconds:
- Info button on digital channels: get information from channels (ex. KHz, power etc.)
- Exit button: reset your TV to factory settings (get window before start)
- Return button: start a diagnostic (get window before start)
If you found more hidden options, share here!
[TIP] Hidden diagnostic functions on remote control