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Master
517 Answers
- Posted on May 08, 2011
Re: TV won't turn on. Is there a fuse that needs...
Good day!
When the TV is not turning ON it doesn't mean that there's a busted fuse inside although it have a possibility.There are a lot of causes to be considered.Like shorted transistors,leak capacitors open resistors and shorted diode.
Follow this D.I.Y procedures to find the exact problem of your TV.
- Remove the back cover of your TV.
- After that,find the power supply board.
- If you already found the power supply,plug-in your TV
and power it ON.Check the input voltage of it,using multimeter (AC
range).If the power supply have no input voltage the problem could be
the power cord.Replace it.
- If the power supply have the input voltage,try to test
the output voltage if have 5vdc for the system and logic supply,12vdc
for the sounds and 24vdc for the back-light inverter.Use your multimeter
tester (DC range) to test that.
- If the power supply have a voltage outputs such as
5vdc,12vdc and 24vdc and the problem is still there.The problem could be
the main board.Replace it with the same type and model # because the
main board is no very difficult to fix and its very sensitive.
- If the power supply have no output voltage or the voltage is too low,just ignore the step # 5 because the problem is not on the main board,its on the power supply board.
Check the following to fix the power supply board:
- Fuse: Check the fuse if it is busted or blown.
- Power transistor (regulator): Check the regulator if it is shorted or leak.
- Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
- Capacitor: Also check the capacitors if it is leak or bulging top.
NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.
Thank you and good luck.Please don't forget to vote and rate my answer.
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