If the TV is powering up. Then with the TV OFF disconnect the Backlight connector and set your DMM to 1000V and connect the Balck lead to the chassis ground or and metallic area and the Red lead to the +ve pin on the Backlight LED connector. Turn ON the TV. If the Driver is working the voltage would go to 300V and gradually go back down to 70V or 0V.
If that doesn't happen the Driver is not working. Hope this helps.
Andrew F. Ali
Badcaps Legend
Last Activity: 02-25-2025, 10:46 AM
Joined: 01-19-2014
Location: Point Fortin
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Re: Sharp LC-50LB261U
This is an easy fix. Replace ALL the Backlight strips with NEW strips. The hardest thing to do is removing and replacing the Screen without breaking it. But it can be done.Leave a comment:
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Re: Samsung un50nu7090 standby light blinks once
I would agree with them that the Backlights are the fault.Leave a comment:
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Re: Westinghouse WG50UR4100 Am I getting scammed?
Software does not match for the T-CON Bd and the Panel.Leave a comment:
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Re: Putting LCD panel from Vizio TV into another brand TV
If the T-CON Bd connector match, you could give it a try. That is the 12V on the same pins and same amount and placement of gold fingers on the Flat Flexible cable from the Main Bd.Leave a comment:
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Re: Samsung Plasma PN60F5500
If you can find another Y board to buy. Replace the defective board.Leave a comment:
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Re: Ocosmo E32 Backlight LED Replacement
My recommendation is to replace ALL the LED strips with new ones. You will not wnat to have a repeat failure with the older ones acting up in the short term. Do a complete job once and for all.Leave a comment:
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Re: Altec Lancing ACS41
I still have this system on my computer. It has worked quite well over the years and still sounds superb. Music is smooth and clear. Newer systems I tried don't give me that 'thump' I like to hear. Good one, budm.Leave a comment:
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Re: 47LW6500 Debug Help - Power Board or Mainboard?
These boards are difficult to get unfortunately. However, it is not working properly at the moment, so the option is to heat up the Main Chip. I never tried the baking the board method but I have read on this Forum that it works but temporary though.Leave a comment:
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Re: 47LW6500 Debug Help - Power Board or Mainboard?
I have found with the LW series LG LED TVs that the BGA chip becomes disconnected from the Main Bd. Remove the Heatsink and using a Hot air Station and heat the BGA chip for 15 mins at 350 degrees. allow it to cool on its own and refit the Heatsink and give it a try. I have successfully done this accouple times already without any call back complaints.Leave a comment:
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Re: Philips 42PFL6198k/2 sound ok, no picture
Look for a shorted SMD capacitor on the long panel board where the T-CON Bd. goes. Try disconnecting 0ne side at a time to determine which side the fault lies. With the Power OFF test each SMD cap by setting your DMM on the continuity mode.Leave a comment:
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Re: Sceptre 50" Blackscreen
Seems like bad Backlights at first reading. Measure the voltages wrt chassis GND. If the Backlights are bad you would get a +ve reading on the +ve LED wire and 0V on the -ve wire.Leave a comment:
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Re: Samsung UN65EH6000 - Vertical Lines sometimes, other visual artifacts
Agreed....Leave a comment:
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Re: LG 55LA6200 Back light strips
I am correct in what I am saying....Last edited by Andrew F. Ali; 11-17-2019, 09:28 AM.Leave a comment:
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Re: Samsung UN55hu7200fxza dim top half of screen
Weak or dim Backlight strips at the top. Open up the Panel and replace ALL the Backlight strips wit NEW strips.Leave a comment:
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Re: LG 55LA6200 Back light strips
LG TVs use 6V LEDs and sometimes Aftermarket suppliers sell 3V LEDs on their strips. Your problem is the LED Strips are incorrect. Look at the original strips and get the Part No. off it. This is the ONLY solution. Turning down the Backlight setting is a good suggestion but does not work. Get the EXACT replacement strips.Leave a comment:
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Re: Samsung UN65EH6000 - Vertical Lines sometimes, other visual artifacts
Inspect the Diffuser and Polariser sheets for damage or folds.Leave a comment:
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Re: LG TV 42LW4500 does not starts up LED red white red
The LW series LG TVs have a common problem with the BGA Chip. Try heating the BGA chip at 350F with a Hot Air Station for 10Mins.Leave a comment:
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Re: Polaroid TDA-03211C - Strange Spots on Screen
Most likely moisture as dick_barton suggests. Don't apply heat to the spots directly on the Screen. The best way would be to open up the Panel and take a peek. If it is moisture I would wipe it with a absorbent cloth and then with a lint free cloth.Leave a comment:
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Re: LG 50uh5500 no picture
Your TV has bad Backlights. You would need to open up the Panel and carefully remove the very fragile glass screen. Replace ALL the Backlights strips though not all would be defective but it is good practice to replace all as you would not want repeated failure to have to open up the Panel innumerable times risking breaking the fragile glass Screen. The LED Strips would be in pairs and would have a Part No. for left and right pairs. A 50 inch TV like yours may have five pairs probably with 8LEDs on one side and 7 LEDs on the other. Good Luck.Leave a comment:
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