Proscan 50" PLDED5066A-E no backlights

[dick_barton]

Re: Proscan 50" PLDED5066A-E no backlights

It's possibly a led fault. Turn the backlight down (not brightness) say to 60% and see if they stay on longer which they usually do when there's a led problem.

[Andrew F. Ali]

Re: Proscan 50" PLDED5066A-E no backlights

OK so you do have a LED backlight problem. Do as dick barton suggests and see if it will remain on longeror not shut off at all. If that works it still would not last too long and you would have to crack the panel open and replace those LED strips. If you figure out which LEDs are faulty DO NOT jump them wit wire as the rest of the strip will demand more current from the Driver and eventually burn out. In my experience the best repair is to change out all the strips with new ones as the older ones will fail in time and you will have to open her up again.

[rustyweld]

Re: Proscan 50" PLDED5066A-E no backlights

All the backlights light up so why would you say its a backlight problem? I just thought something other was shutting the light down. Could I check the leads to the lights with a multi meter and what shoud the readings be.

[rustyweld]

Re: Proscan 50" PLDED5066A-E no backlights

I tried to turn the backlights down but the tv does not have a backlight setting.

[budwich]

Re: Proscan 50" PLDED5066A-E no backlights

what is your contrast setting? what is your brightness setting? what is your dynamic contrast setting?

you might have to get into the service menu to "attack" the backlight setting.

[Andrew F. Ali]

Re: Proscan 50" PLDED5066A-E no backlights

All the backlights light up so why would you say its a backlight problem? I just thought something other was shutting the light down. Could I check the leads to the lights with a multi meter and what shoud the readings be.

I was thinking that testing the backlight tester with a MM or LED tester does not supply the full current and that when they are in the circuit getting full current they trip out. We have seen this before.

[attainteddragon]

Re: Proscan 50" PLDED5066A-E no backlights

you could also be looking at a connection issue in between the led strips. as they warm up, they are loosing connection somewhere. either way, you will need to look inside.

[budm]

Re: Proscan 50" PLDED5066A-E no backlights

https://www.badcaps.net/forum/attach...2&d=1448078807
Try turning down the Brightness, this set may use the Brightness setting to also controlling the Backlights level.
You can take the reading at the 'ADJ pin and see if that Voltage will go down when Brightness is turned down or not.

[dick_barton]

Re: Proscan 50" PLDED5066A-E no backlights

I tried to turn the backlights down but the tv does not have a backlight setting.

This may be available from the service menu.

[rustyweld]

Re: Proscan 50" PLDED5066A-E no backlights

Thank you Guys for your help.
I just ordered a Output Multipurpose Smart LED Lamp LCD TV Backlight Tester so I might be a little while before I get back at the tv. It seems to be a backlight problem so i'm stuck without a backlight tester.