Slide 74
SU and SD Boards Isolation Procedure
The 2008, 2009, and 2010 plasma models are designed not to turn-on if either the
SU or SD board is disconnected.
Disconnecting either causes the unit to shutdown and the power LED to blink 7
times.
Unplugging any of the connectors SC41/SU41, SU11/SD11, and
SC42/SD42, opens the interlocked connection between VF_GND and CHA on the
SC board. This triggers the 7 blinks SOS detect circuit shutting down the TV and
making the power LED blink 7 times.