السلام عليكم
اخي الكريم هذه هي طريقة الدخول الى السرفيس
Entering and cancel the adjustment process mode
While holding down the TV/VIDEO and Volume DOWN keys at the same time, plug in the AC cord to turn on the power. (“K123” standing for
inspection process mode is displayed on the middle right section of the screen.)
Press the Channel DOWN and Volume DOWN keys at the same time. (The adjustment process mode screen appears.)
To cancel it, turn off the power using the Power switch or remote control.