Sylvania 6842THG Service Manual page 97

NO display (operating Voltage but an image doesn't exist on Screen)
–> No Display is related with Y-MAIN, X-MAIN, Logic Main and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective
board.
Logic Main
[LED 2011 Blinks]
Check
LVDS Cable
1
2 LED 2010; Green
Fuse F2000, F2001
3
4 CN2026 Cable
Check
F5001 for Vdd (5V)
1
2 F5004 for Vcc (15V)
3 F5003 for Vs(200V)
Check
1 Q5009 ~ Q5021
No Display
Y – Main X – Main
Logic-main
Y-main
Fuse
FET, IGBT
Y- main C Check P Point
2-3-2
Y – Buffer
NO
Replace Logic B'd
YES
NO
Replace Logic B'd
YES
OPEN
Replace Y-B'd
Short
SHORT
Open
oint
Broken
panel
Replace Y-B'd
PZ3PDMOP