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Search took 0.02 seconds. Search: Posts Made By: neilc6
Forum: Troubleshooting TVs and Video Sources Yesterday, 06:43 PM
Replies: 8
Views: 127
Posted By neilc6
Re: TCL 55S421 powers on + LCD display + sound but no backlight

Time to buy an LED tester if you want to repair TVs. Easy to confirm an open circuit in the string plus you can power the LEDs independent of the power supply to check the screen before ordering new...
Forum: Troubleshooting TVs and Video Sources 05-16-2022, 02:20 PM
Replies: 22
Views: 6,539
Posted By neilc6
Re: Samsung UN60EH6003F, no picture, no T Con board, boot loop, etc.

I was finally able to find a BN96-28943A board at a decent price. Installed it an now have video. Unfortunately TV has dark spots from bad backlights as well that need to be replaced.
Forum: Troubleshooting TVs and Video Sources 05-07-2022, 10:12 PM
Replies: 2
Views: 223
Posted By neilc6
Re: Fixed dead Samsung UN50NU6900F

NU series has lots of backlight failures due to edge lit design with lower number of LEDs running brighter and hotter. Rare to see cap failures in LED TVs. Have never seen one personally yet.
Forum: Troubleshooting TVs and Video Sources 05-05-2022, 10:48 PM
Replies: 10
Views: 301
Posted By neilc6
Re: 65UJ654T Backlight but no image

If neither side is providing an image, it is worth trying to replace the tcon board. Maybe find a seller that takes returns.
Forum: Troubleshooting TVs and Video Sources 04-26-2022, 08:30 PM
Replies: 5
Views: 335
Posted By neilc6
Re: Samsung UN50TU8000F - 1 horizontal line, 1 vertical

Vertical lines can't be fixed with tape method. Google Sony tcon training manual.
Forum: Troubleshooting TVs and Video Sources 04-24-2022, 10:10 PM
Replies: 15
Views: 992
Posted By neilc6
Re: LG 55uj6200 wont turn on

LG TVs have shutdown protection of the backlights if the sensed voltage is out of range due to shorted LEDs. The backlights should flash (if there isn't an open circuit) with a corresponding spike...
Forum: Troubleshooting TVs and Video Sources 04-24-2022, 11:44 AM
Replies: 15
Views: 992
Posted By neilc6
Re: LG 55uj6200 wont turn on

You still have a backlight problem. When you do backlight replacements, you should replace all the strips with new and turn down the backlight level for all inputs and apps. You can test the new...
Forum: Troubleshooting TVs and Video Sources 04-23-2022, 04:31 PM
Replies: 18
Views: 616
Posted By neilc6
Re: LG 55UJ6300 Very Dim

Did you replace all the strips with new or just the bad strip? Did you turn down the backlight level after the repair and check all inputs and apps?
Forum: Troubleshooting TVs and Video Sources 04-21-2022, 12:25 PM
Replies: 4
Views: 230
Posted By neilc6
Re: Samsung TV UE48H6740SV - No Picture - Just Sound

With the power off, disconnect one side at a time between the tcon and panel and see if one side displays an image.
Forum: Troubleshooting TVs and Video Sources 04-20-2022, 08:24 AM
Replies: 4
Views: 215
Posted By neilc6
Re: LG 49LB5500 flashing as soon as plugged in

A LED tester only puts out 15 to 20 mA while the TV runs at several hundred and may not detect bad strips. Record the flash with the panel removed and see what LEDs are not lighting up.
Forum: Troubleshooting TVs and Video Sources 04-19-2022, 11:07 PM
Replies: 4
Views: 215
Posted By neilc6
Re: LG 49LB5500 flashing as soon as plugged in

Flashing on LB series is bad backlights. There is something wrong with your replacement strips.
Forum: Troubleshooting TVs and Video Sources 04-19-2022, 12:31 AM
Replies: 3
Views: 226
Posted By neilc6
Re: Three vertical lines without t-con board connected: Sony 55X8000F

Vertical lines are bad panels and not the tcon board. Google Sony tcon training manual.
Forum: Troubleshooting TVs and Video Sources 04-18-2022, 12:47 PM
Replies: 3
Views: 207
Posted By neilc6
Re: RCA LED42C45RQ Power, no sound or picture.

Yes one bad LED can trigger protection shutdown because the feedback voltage is out of range.

https://www.badcaps.net/forum/showthread.php?t=66023
Every RCA LED TV I've encountered had bad...
Forum: Troubleshooting TVs and Video Sources 04-16-2022, 02:20 PM
Replies: 18
Views: 616
Posted By neilc6
Re: LG 55UJ6300 Very Dim

On that model the LEDs turn blue as well. Best to replace them all with the TV apart.
Forum: Troubleshooting TVs and Video Sources 04-15-2022, 05:37 PM
Replies: 18
Views: 616
Posted By neilc6
Re: LG 55UJ6300 Very Dim

Backlight issues are 99% the backlights themselves. On LGs, the protection circuitry usually kicks in to shut down the backlights but I have seen it a few times where it doesn't. ...
Forum: Troubleshooting TVs and Video Sources 04-12-2022, 06:27 PM
Replies: 28
Views: 1,219
Posted By neilc6
Re: Samsung ue55nu7096u - no backlight - faulty LEDs?

The panel assembly part number should be on a sticker behind the back cover. The screen size should be embedded in it same as model number. From Shopjimmy, possible panel numbers are CY-CN055HGLV2H...
Forum: Troubleshooting TVs and Video Sources 04-10-2022, 07:57 PM
Replies: 55
Views: 1,320
Posted By neilc6
Re: Sound but no Back lights

Your LED tester may not detect the bad LEDs since it runs at much lower current than the TV.

Every RCA LED TV I've encountered had bad backlights if it turned on with no backlight or flash of...
Forum: Troubleshooting TVs and Video Sources 04-09-2022, 09:52 AM
Replies: 28
Views: 1,219
Posted By neilc6
Re: Samsung ue55nu7096u - no backlight - faulty LEDs?

If you want to repair TVs, you need to buy a LED tester. 80% of all problems I encounter with LED TVs are bad backlights and the first suspect if the TV turns on with single or repeating flash of...
Forum: Troubleshooting TVs and Video Sources 04-08-2022, 04:45 PM
Replies: 28
Views: 1,219
Posted By neilc6
Re: Samsung ue55nu7096u - no backlight - faulty LEDs?

You likely have an open circuit in each strip. With bad backlights, just replace them all with new. They can have different wiring configurations so there isn't a point in trying to figure out how...
Forum: Troubleshooting TVs and Video Sources 04-08-2022, 04:18 PM
Replies: 16
Views: 2,266
Posted By neilc6
Re: 55" RCA LED55G55R120Q no backlights

Every RCA LED TV I've encountered had bad backlights if it turned on with no backlight or flash of backlights. Impossible to get new LED strips for them so I repair the individual LEDs and turn down...
Forum: Troubleshooting TVs and Video Sources 04-07-2022, 02:27 PM
Replies: 28
Views: 1,219
Posted By neilc6
Re: Samsung ue55nu7096u - no backlight - faulty LEDs?

Though there are two strips, they are likely wired as a single string so one open circuit would create no backlight at all.
Forum: Troubleshooting TVs and Video Sources 04-06-2022, 10:38 AM
Replies: 28
Views: 1,219
Posted By neilc6
Re: Samsung ue55nu7096u - no backlight - faulty LEDs?

NU series are edge lit from the bottom and 55 in has two strips. LED failing open circuit would have acted like a fuse and might prevent the plastic panel from melting. ...
Forum: Troubleshooting TVs and Video Sources 04-05-2022, 04:15 PM
Replies: 7
Views: 319
Posted By neilc6
Re: LG 55LN5400 LED flash then dark troubleshooting

LGs have shutdown protection for the backlight circuit. Failing LEDs can have fluctuating voltages or go open circuit triggering the shutdown....
Forum: Troubleshooting TVs and Video Sources 04-04-2022, 12:12 PM
Replies: 13
Views: 357
Posted By neilc6
Re: LG 32LJ610V with the blue tint of death. LED replacing...

You can turn the TV with the panel off on most TVs to test the backlights. Easier on Samsungs since you can just unplug the the main board cable. Maybe not clear but the pictures of the LEDs in the...
Forum: Troubleshooting TVs and Video Sources 04-04-2022, 08:47 AM
Replies: 24
Views: 723
Posted By neilc6
Re: LG 55LF6000-UB main board swap from 55UH6090 powered up but component on MB fried

55LF6000 is a non smart TV and doesn't take long to boot. It is completely different from a UH smart TV main. Quick ebay search shows it selling for less than $20. Also shows Shopjimmy is selling...
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