Troubleshooting; No Backlight Problem - Sharp LC-40LE530E Service Manual

LC-32LE530
LC-40LE530

13. TROUBLESHOOTING

13.1. No Backlight Problem

Problem: If TV is working, led is normal and there is no picture and backlight on the panel.
Possible couses: Backlight pin, dimming pin, backlight supply, stby on/off pin
Backlight pin should be high in open position. If it is low, please check Q41 and panel
cables.
Dimming pin should be high or square wave in open position. If it is low, please check
S111 for Mstar side and panel or power cables,
connectors.
Backlight power supply should be in panel specs.
TROUBLESHOOTING
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