JVC LT50C-550 backlight issue

[Bloopeta]

I have a JVC LT50C-550

When switched on, it flashes on for a brief second as if backlights are at fault. I have stripped down and tested LEDs and all are fine, can illuminate the array no problem with tester.

All caps look ok by sight.

Any help as where to go next grately appreciated

[dick_barton]

Re: JVC LT50C-550 backlight issue

Although the tester is useful it does not pass a high enough current to fully test the strips.
They may well show good at 30 - 40mA testing current, but fail when running at higher currents.

I can't quite make it out but does it say 800mA led current on the power supply board?

[Bloopeta]

Re: JVC LT50C-550 backlight issue

Although the tester is useful it does not pass a high enough current to fully test the strips.
They may well show good at 30 - 40mA testing current, but fail when running at higher currents.

I can't quite make it out but does it say 800mA led current on the power supply board?

It does m8 yes, 800ma

[neilc6]

Re: JVC LT50C-550 backlight issue

Remove the panel and record the flash. Go frame by frame to see which strips are out. I would just replace all the strips with new.