Polaroid MSDV3233-U3 Backlights problem

[Chrissygizmo]

Hi all, I have a 32 inch polaroid that I am trying to repair . The ORIGINAL problem was that 1 3v led had failed, I replaced the led using a 3v led from a scrap strip.

Anyway it started out as 1 led . After replacing the dud one I tested it before putting it back together, I noticed there was another led that wasn't powering up immediately like the rest so I changed that 1 too just to be safe. That's when it went fkn mental.... I tested it again but there was a full strip flickering, I changed most of them , to cut to the chase I've ended up replacing all of them, I don't have the correct LEDs so I've used what I had , the positive connections on the strips I'm repairing are thin & neg obviously the thicker side... I've used the vice versa type LEDs.. Anyway all 3 strips light up when testing individually, but when I plug them together only half of them are working when I put the tester probes straight to the leds , I don't get anything when probing the wires that supply the power...

There's no point in giving details of the board but the strips are "ks-d 94v-0 E465853" ....

Any help would be really appreciated..


👍TIA👍

[neilc6]

Re: Polaroid MSDV3233-U3 Backlights problem

Sounds like you have a continuity problem to your strips. You can trace it with your LED tester or your multimeter in resistance mode. Make sure when you test it from the connector it isn't plugged into the power supply.

[Chrissygizmo]

Re: Polaroid MSDV3233-U3 Backlights problem

Thanks for that , I managed to find the problem, I hadn't seated one of the leds properly.