Question about Televison & Video
If you've already checked and confirmed that the bulb is not the caused of this symptoms, there's two probable caused of this fault.
1. Most likely the inverter board problem - Once this board was dead, there's no high voltage supply will produce to lit the backlight resulting to black picture. You must check it for open fuse, fusible resistor in line with shorted driver transistor, open driver transistor, open high voltage transformer.
Another caused why the inverter board is disable is when it gone to overload which is caused by shorted high voltage transformer.
2. Power supply failure - once the supply voltage feeding the inverter board is gone, the inverter board is disable. You must check the output of the power supply feeding the inverter board to determine where the fault came from.
You must prepare some tools and test instrument and know safety precaution in troubleshooting, know how to test the affected parts if you are going to fix it yourself or else I would advice you to look for a qualified technician to isolate the faulty parts.
Hope I helped you.
Have a nice day!
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Posted on May 19, 2011
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Posted on Jan 02, 2017
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