I know one more combination takes you to service menu, do it when your TV's power off. Then press sequentially
INFO MENU MUTE POWER -> Service Menu
Usage: Up&Down arrows make selections while Right&Left Arrows makes changes.
WARNING! You can damage your TV with this!
You needed to backup previous value before changing any option.Some options cannot be reverted once changed.
I've been picking apart the T-CHU7DEUC revision 1006 firmware for a UE46B7020WW recently.
The exeDSP loads up in IDA Pro pretty well, though some of the platform's ARM opcodes appear not to be recognized. But it's chock full of interesting symbol information and debug strings that give away a lot about what it's doing.
I found some interesting code regarding key sequences, so if you type certain buttons on the remote in a certain order, it performs a function. Couldn't quite figure out all the keys (and the TV is my flatmate's, and he won't let me test most of them ) but you guys might like to have a go:
MUTE 1 1 9 OK -> "HotelFactory"
MUTE 1 2 0 EXIT -> "LEDDemo" (didn't seem to do anything?)
MUTE 1 8 4 EXIT -> "DV"
MUTE 1 8 5 EXIT -> ?
MUTE 1 8 7 EXIT -> "DSG" (some HDMI test)
INFO 3 2 1 EXIT -> "Calibration"
MUTE 7 3 7 OK -> "PDPFactory"
MUTE 7 5 0 EXIT -> "FlashPlayerDemo" (goes to content library screen)
MUTE 9 4 8 EXIT -> "YahooFactoryReset" (resets widgets)
MUTE OK MUTE OK -> "InfoLinkDemo"
MUTE ["RSS" key?] -> "ControlPanelVoltage"
INFO [unknown key with code 0x3B] -> "Factory"