Toshiba 58L4300UC Dim picture

[Mayn]

Re: Toshiba 58L4300UC Dim picture

Yes, the image was dim before I repaired the strip.

Hmmm, very interesting about the power supply board. the person I got it from said the main board had been changed, but could easily have been mistaken as they had someone do it for them. gonna have to do some more digging on that one.

Wonder what the difference is. Can't be much.

[Mayn]

Re: Toshiba 58L4300UC Dim picture

Anyone have either power supplies lying around collecting dust they want to get rid of cheap? Lol

[Mayn]

Re: Toshiba 58L4300UC Dim picture

Or any ideas on how to boost the voltage going to the LEDs? I can't just give up on this tv. The image is perfect, just can't make it brighter.

[dskall]

Re: Toshiba 58L4300UC Dim picture

Maybe this tv has a ambient light sensor that is bad. Can you measure current on one led circuit?

[Mayn]

Re: Toshiba 58L4300UC Dim picture

There is an auto dimming feature, but I have it turned off. Worth a shot though

[Mayn]

Re: Toshiba 58L4300UC Dim picture

So I had an idea last night.

I figured that if the power supply should be putting out 137V to the backlights but it's only putting out 115V, that if I did a bit of soldering and jumpered 4 led's per string that it should work out about right.

So I did it. Did it in a kind of random pattern so as to not end up with a dark spot on the screen. I have to say, it works great now. Brightness is where it should be. I can even dim the backlights lol