Troubleshooting; No Backlıght Problem - VESTEL MB120 DS Service Manual

3. Select the corresponding COM port and click File to load the fw hex file.
4. Press " Program MCU " to enter ICP mode. Then restart the DS product.
5. When you finish all of settings, press " Program MCU " again to program the firmware.
6. When you program the firmware successfully, EP Console would appear a message of OK .
7. Finally restart the DS product.
If you see fail, please reset monitor and try program again.

18. TROUBLESHOOTING

A. NO BACKLIGHT PROBLEM
Problem: If product is working, led is normal and there is no picture and backlight on the panel.
Possible causes: Backlight pin, dimming pin, backlight supply, stby on/off pin
BACKLIGHT_ON/OFF pin should be high when the backlight is ON. R89 must be low when the backlight
is OFF. If it is a problem, please check Q10 and the panel cables. Also it can be tested in TP137 on main board
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