Troubleshooting No Power/Dead Unit
Do the AC relays
click after the TV is plugged
into the AC line?
Is the TV turning On
Is there 5V present
when the TV is plugged into
the AC line?
Replace
the A board
Replace
The K board (Check
Wires between A1
and K1)
Replace
The P board
Yes
Yes
Yes
Yes
NO
NO
NO
NO
Unplug the TV and place your volt-meter
on pin 7 of connector P7. Plug in the TV
and press the power switch
Is there 3.2V
present when
the power
button is
pressed?
Unplug the TV and
disconnect A1 on the A
board. Plug in the TV
and turn the power on
Unplug the TV and place your
volt-meter on pin 1 of
connector P7. Plug in the TV
But do not turn the power on
Replace
The P board.
(Check the AC Cord)
Unplug the TV and
disconnect A1 on the A
board. Plug in the TV
but
do not turn the power on
Plug in the TV.
Do not turn the power on
Do the relays click now?
Yes
NO
Replace
the A board
Start Here
Slide 59
Summary of Contents for G20 Series
Page 11: ...Detailed Troubleshooting Procedure for Shorted Vsus Slide 11...
Page 13: ...Detailed Troubleshooting Procedure for Shorted P15 Slide 13...
Page 15: ...Detailed Troubleshooting Procedure for Shorted Vda Slide 15...
Page 17: ...Troubleshooting 1 Blink Failure Slide 17...
Page 19: ...Troubleshooting 2 Blinks Failure Slide 19...
Page 22: ...Troubleshooting 3 Blinks Failure Slide 22...
Page 25: ...Troubleshooting 4 Blinks Failure Slide 25...
Page 28: ...Troubleshooting 5 Blinks Failure Slide 28...
Page 32: ...Troubleshooting 6 Blinks Failure Slide 32...
Page 35: ...Troubleshooting 7 Blinks Failure Slide 35...
Page 38: ...SU SD boards Together Isolation Procedure Slide 38...
Page 42: ...Vfo VSCN F 5V_F Resistance Measurements SU SD boards Slide 42...
Page 45: ...Troubleshooting 8 Blinks Failure Slide 45...
Page 48: ...Troubleshooting 9 Blinks Failure Slide 48...
Page 50: ...Troubleshooting 10 Blinks Failure At Plug in Slide 50...
Page 52: ...Troubleshooting 10 Blinks Failure At Power on Slide 52...
Page 54: ...Troubleshooting 12 Blinks Failure Slide 54...
Page 57: ...Troubleshooting No Power Dead Unit Slide 57...
Page 60: ...TV s Behavior After Connectors Removal Slide 60...
Page 62: ...End Slide 62...