Vizio D50u-D1 backlight issues (Please Help if you can)

[JunkmanJimbo]

I've been having issues with the backlights failing on this particular model. When these backlights fail (one backlight failure on a strip), the srip will start flashing on and off. I will replace the individual backlights that are defective, test for a day or two, then sell it, only to have it come back within a few weeks with another failed backlight. Is this model known for this backlight issue and is there a fix for it. These particular models keep coming back for the same problem. Thanks in advance for any help offered.

[JunkmanJimbo]

Re: Vizio D50u-D1 backlight issues (Please Help if you can)

I've been having issues with the backlights failing on this particular model. When these backlights fail (one backlight failure on a strip), the srip will start flashing on and off. I will replace the individual backlights that are defective, test for a day or two, then sell it, only to have it come back within a few weeks with another failed backlight. Is this model known for this backlight issue and is there a fix for it. These particular models keep coming back for the same problem. Thanks in advance for any help offered.

Has anyone else had these problems with the Vizio D50u-D1? Is this a common problem with this model and is there a fix for it? Thanks in advance.

[Andrew F. Ali]

Re: Vizio D50u-D1 backlight issues (Please Help if you can)

Did you turn down the Backlight level after replacing the LED? Also, some times it is better to replace the entire strip if you are getting repeated failure. Most likely it would be other LEDs on the same strip that failed.

[JunkmanJimbo]

Re: Vizio D50u-D1 backlight issues (Please Help if you can)

Just saw your reply, Andrew. Thanks for your help. Actually I have turned down the backlight level on each tv I replace the individual LED's in but that doesn't seem to help. I just recently started to replace all LED strips in these particular models. For some reason, the backlights seem to fail prematurely in this model. I have many other model Vizio's that don't have any backlight issues, just this particular model. I was wondering if this is a known problem with this model. Thank you for your help!

[dskall]

Re: Vizio D50u-D1 backlight issues (Please Help if you can)

I find Vizio in general suffer from backlight problems. I modify power supply on Vizio. Just adjusting backlights will not really help if you give it to someone else and you cannot control what they do. I have measured current to backlights. And it measures around 430ma at full brightness. Max ratings seem to be about 350ma on these led's. I haven't measured current on other makes that don't suffer led failure. Reducing max. current to around 280-300ma makes me more confident that led's will last.

[JunkmanJimbo]

Re: Vizio D50u-D1 backlight issues (Please Help if you can)

Thank you dskall for your help. Would you consider sharing your modification with me in detail (step by step)? I would be so appreciative.

[dskall]

Re: Vizio D50u-D1 backlight issues (Please Help if you can)

Here's a couple of threads may help: https://www.badcaps.net/forum/showthread.php?t=61722 , https://www.badcaps.net/forum/showthread.php?t=65978