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Search: Posts Made By: neilc6
Forum: Troubleshooting TVs and Video Sources 07-01-2022, 12:29 AM
Replies: 4
Views: 100
Posted By neilc6
Re: LG 55LB5900 backlight flashing

Both LB and LF series flash with backlight issues. https://techhometravel.com/lg-ln-series-bad-led-backlights/
Forum: Troubleshooting TVs and Video Sources 06-30-2022, 03:23 PM
Replies: 17
Views: 2,924
Posted By neilc6
Re: Post your Samsung NU model series backlight failures and diffuser melt-downs here

Showed up in my Aliexpress recommendations.

https://www.aliexpress.com/item/1005004049744840.html
Forum: Troubleshooting TVs and Video Sources 06-26-2022, 06:59 PM
Replies: 6
Views: 273
Posted By neilc6
Re: Seiki SE42UMT, Standby Light, No power On

If you have standby light and standby voltage and the TV doesn't turn on, the main board is suspect. Could be eeprom but don't see it in your pics. If you can find the eeprom, you can try freezing...
Forum: Troubleshooting TVs and Video Sources 06-26-2022, 09:55 AM
Replies: 5
Views: 213
Posted By neilc6
Re: LG 47LN5400 Replacement backlights

All the LN strips on aliexpress and even shopjimmy are substitute strips. I stick to one or two sellers (not the cheapest) and turn down the backlight to around 55% on ALL sources and apps for smart...
Forum: Troubleshooting TVs and Video Sources 06-16-2022, 04:12 PM
Replies: 17
Views: 2,924
Posted By neilc6
Re: Post your Samsung NU model series backlight failures and diffuser melt-downs here

Just did a UN43NU6900F. Strips look like they use the more standard rectangular LED vs the high temperature, high heat square ones that tend to melt the light spreading panel. No panel damage on...
Forum: Troubleshooting TVs and Video Sources 06-13-2022, 03:32 PM
Replies: 8
Views: 291
Posted By neilc6
Re: Insignia FireTV NS-50DF81NA19 backlight on but no image

With panel boards, shorted chip caps will be a likely suspect if a new tcon didn't fix it. There is a youtube video of a guy isolating the short with a milliohmmeter. ...
Forum: Troubleshooting TVs and Video Sources 06-13-2022, 08:25 AM
Replies: 15
Views: 376
Posted By neilc6
Re: LG 42LA6130 did not turn on

Replace them all with new. They all have wear and will eventually fail. Lots of sellers on ebay and Aliexpress.
Forum: Troubleshooting TVs and Video Sources 06-12-2022, 03:54 PM
Replies: 15
Views: 376
Posted By neilc6
Re: LG 42LA6130 did not turn on

LA series is similar to LN series which has high rate of failure of LED backlights. Your original power supply likely was turning on with the backlights shutting down into protection mode or an open...
Forum: Troubleshooting TVs and Video Sources 06-09-2022, 08:36 PM
Replies: 24
Views: 6,935
Posted By neilc6
Re: Samsung UN60EH6003F, no picture, no T Con board, boot loop, etc.

I had sent my original board for repair but that part number likely didn't have that IC.
Forum: Troubleshooting TVs and Video Sources 06-06-2022, 10:06 PM
Replies: 7
Views: 235
Posted By neilc6
Re: Thomson TV no backlight again

This fix is like disconnecting your check engine light in your car if it comes on. Problem solved!
Forum: Troubleshooting TVs and Video Sources 06-06-2022, 05:25 PM
Replies: 15
Views: 1,307
Posted By neilc6
Re: Toshiba 50L5200U

LEDs are wired in series like a string of Christmas lights. It only takes one bad LED to shut down the string or to kick in protection shutdown. All the LEDs have wear and will eventually fail...
Forum: Troubleshooting TVs and Video Sources 06-01-2022, 01:14 PM
Replies: 3
Views: 211
Posted By neilc6
Re: 55G310U Toshiba Dead

Power supply typically supplies standby voltage to the main board. When the TV is turned on, processor will send a power supply on to fully turn on ps and backlight on signal. If you have no...
Forum: Troubleshooting TVs and Video Sources 05-27-2022, 08:51 PM
Replies: 13
Views: 473
Posted By neilc6
Re: TCL 55S421 powers on + LCD display + sound but no backlight

Individual LED replacement is never recommended especially with new strip prices low with lots of sellers on Aliexpress and ebay. All the LEDs have wear and will eventually fail. Every time you...
Forum: Troubleshooting TVs and Video Sources 05-24-2022, 02:29 PM
Replies: 2
Views: 144
Posted By neilc6
Re: Sony KD-70X690E Very Dim

X690E series have backlights that turn blue. They may also burn out and give 6 blink error code. https://techhometravel.com/lg-49uj6500-ub-blue-purple-tint/ Extremely difficult to remove the panel...
Forum: Troubleshooting TVs and Video Sources 05-24-2022, 08:48 AM
Replies: 10
Views: 308
Posted By neilc6
Re: LG 42LE4900 no backlight, possibly no display

LE, LV, LW and LS series suffer from BGA failures on the main board. To confirm, heat up the processor with a hair dryer before plugging in. Lots of ebay sellers offering repair service in the US. ...
Forum: Troubleshooting TVs and Video Sources 05-23-2022, 10:18 PM
Replies: 3
Views: 186
Posted By neilc6
Re: 60LN5600 white reflective sheet

I did a 60LN awhile ago with the taped down sheet and never again. In hindsight, it would be better to cut out the strips with an exacto knife instead of trying to remove the sheet. I have salvaged...
Forum: Troubleshooting TVs and Video Sources 05-23-2022, 06:24 PM
Replies: 12
Views: 236
Posted By neilc6
Re: RCA led50b45rq tv backlights flash then shuts down

Bigdog8882 has a youtube video on that model - https://www.youtube.com/watch?v=DtK1JhIqChw TLDW - he replaces all the backlights with another set
Forum: Troubleshooting TVs and Video Sources 05-23-2022, 05:54 PM
Replies: 12
Views: 236
Posted By neilc6
Re: RCA led50b45rq tv backlights flash then shuts down

I've done full LED replacements on TVs with bad backlight symptoms and tested the strips afterwards and they all lit up fine. You can video the backlight flash and go frame by frame to isolate the...
Forum: Troubleshooting TVs and Video Sources 05-23-2022, 04:16 PM
Replies: 12
Views: 236
Posted By neilc6
Re: RCA led50b45rq tv backlights flash then shuts down

Flash of backlights is a symptom of bad backlights. Your LED tester only puts out 10-20 mA and the TV can run at several hundred mA. I find it not worth it to repair RCA models since you can't find...
Forum: Troubleshooting TVs and Video Sources 05-21-2022, 02:31 PM
Replies: 8
Views: 1,169
Posted By neilc6
Re: TCL 55S401LHAA No Power

TCLs have lots of backlight failures. Only 2 or 3 rows of LEDs on a TV that size. Panel may also be taped down making the replacement more difficult.
Forum: Troubleshooting TVs and Video Sources 05-18-2022, 06:43 PM
Replies: 13
Views: 473
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: 24
Views: 6,935
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: 290
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: 352
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: 432
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.
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