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HP LT3700 Service Manual: Led Display Abnormal; Lcd Panel Troubleshooting Tips; Inverter Board; Control Board (panel Driver)

Lcd high-definition television.
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LED Display abnormal

The front panel LED uses the following blinking patterns to indicate failures:
Indicator
Amber and aqua LED blinking
Amber LED blinking
Aqua LED blinking
Amber LED blinking
Aqua LED blinking
Amber and aqua LED blinking
LCD Panel Troubleshooting Tips
Inverter board
Power board to panel inverter board (left, right)
Problem:
No back light
Screen flash
If the board is shorted, no power
Action: Change inverter board
Control board (panel driver)
On top of the LCD panel
Problem:
Wrong color
Screen has big block on H or V (over 10 cm)
Action: Change panel
LVDS cable
Main board to LVDS cable to LCD panel connection
Problem: Line/display noise
Action: Change LVDS FPC cable or main board
Screen
LCD panel
Problem:
Mura (cloudiness)
Crack
Action: Change LCD panel
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HP High-Definition LCD TV Service Manual
Blink Frequency
Failure Part
1 sec interval
MCU-Host link error
1 sec interval
TAFE does not respond
1 sec interval
Tuner does not respond
2 sec interval
Digital Demodulator does not respond
2 sec interval
Audio process does not respond
2 sec interval
More than two I2C devices error
Location
Main board
Main board
Main board
Main board
Main board
Main board

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Troubleshooting

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This manual also for:

Lt3200, Lt4200, Lt4700

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