Panasonic Viera TC-P50VT20, Technical Manual, Page: 53 / 101

Slide 53
Upon connecting the Panasonic 3D Plasma Display Television to the AC line, the sound
of relays being triggered can be heard from the Power Supply board. Also a red light
from the Optical jack on the back of the TV can be observed.
Approximately 15 seconds later, the click sound from the relays can be heard again and
the red LED inside the Optical jack turns off.
This condition is normal and by paying attention to this sequence of events, we can
confirm the operation of several circuits inside the TV.
Start-up Process