Re: LG model RU-23LZ21 blowing inverter fuse
I did have a look at the screen to see if there is any image but the fuse blows as soon as the unit is turned on. A fellow on ebay was selling the power supply board and I thought it could be sending over-voltage to the inverter because the fuse is located right next to the connection ribbon coming from the supply board. Upon inspecting the inverter board when I first got the TV it looked like all the capacitors were replaced on it. I held a flashlight to the screen to see if there was any activity within the LCD panel and I could not see any. It was also mentioned that a bad bulb could have caused the inverter to fail, would that be possible?
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Re: LG model RU-23LZ21 blowing inverter fuse
Upon further review, it would have been better if I had answered your question.
If you can see an image in the screen even with the backlights off, the problem is confined to the backlight system - the CCFLs and inverter. I cannot imagine any way the CCFLS could be causing the problem; it is almost certainly due to one or more shorted transistors on the inverter.
If a replacement inverter is available at reasonable cost, or you feel your troubleshooting or soldering skills are not up to the task, replace the inverter. If you would like to try to repair the existing inverter (there is an excellent chance this can be done successfully), post pictures showing the entire top and bottom of the inverter.
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LG model RU-23LZ21 blowing inverter fuse
Hello, I have a small 23" LG TV that keeps blowing the 4 amp fuse located on the inverter board. I have replaced the fuse a couple times but as soon as I turn on the TV it blows again. Here is a photo of its location. I do not want to buy an inverter board if it is something else. The sound and tuner are still working it is just that the screen is black.Attached Filesif you find these attachements useful please consider making a small donation to the site
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Instead of blowing fuses, why not try to find the component that is causing the fuse to blow? Use your DMM to check transistors; maybe you will find a shorted one.
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