Troubleshooting Tips; No Power; No Video; Keypad Abnormal - HP LT3200 Service Manual

Troubleshooting Tips

No Power

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Check the power supply unit (PSU) – Is the PSU board defective?
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Is the power cord connector grounded?
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Check the cable between the PSU board and the main board.
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Is the keypad/remote control power button working?
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Is the power connector connected?

No Video

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Is there an input source connected?
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Is the LED on?
Check the main board and panel cable connection.
o
Is the power on?
o
Is there battery in the remote control?
o

Keypad abnormal

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Is the button working properly?
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Check whether the LED is on.
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Check module.
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Check the cable and main board connection.

LED Display abnormal

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If the LED is off/dark/abnormal – check main board or cable.
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If the LED flickers – Power saving mode in VGA: push any key to restart.

Abnormal Display

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Missing Line:
1. Check the cable between the main board and the control board
2. Check the panel board
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Bright Dot/Dark Dot/Light Leakage/Mura (cloudiness)/Image Sticking/Brightness spot/Particles/Dot Defect – Check
panel
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No Display – Check the main board, inverter board, and panel board.
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Display Noise:
1. Check the cable between the main board and the control board.
2. Check the panel board.
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Flicker/Image too dark – Check main board or inverter board, load default settings.
•
Gray value display – Check main board or panel cable, load default settings.
•
VGA no image – Check main board or D-sub cable: is NB switch to LCD monitor?
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HP High-Definition LCD TV Service Manual