Samsung UN55D6450 turns itself off and on endlessly, no blinks

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Too late

[tom66]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Before you completely strip the set down, any chance of making voltage readings at each pin?

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

There are two harnesses running into the panel from the PSU. The harness for the left strip has ten wire at the PSU but only eight at the strip. The right has right at both ends.

[mmartell]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Eight ?? Jesus, I only have four wires total going in, assuming I have two strips that's only two wires a piece. Quite a difference.

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

How many wires going to each led strip ?

Eight

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Again, after you get it open, and I can repeat the process, I'd like the backlight strips from you. I don't know how else I'd ever get any, so getting them from you would be amazingly fortuitous.

PM me.

[mmartell]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

How many wires going to each led strip ?

[mmartell]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Sweet

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Money shot. The LED strips are on the left and right sides. No LEDs on the top or bottom.

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

There are some slightly sticky rubber strips between the LCD and the casing. Be careful. It's not very sticky. But it could cause damage if you're not careful.

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Again, after you get it open, and I can repeat the process, I'd like the backlight strips from you. I don't know how else I'd ever get any, so getting them from you would be amazingly fortuitous.

Edit: I typed this before a ton of replies but didn't press post. This is awesome! I'm glad there are some screws holding it together under that tape. So, the tape might be a little structural, but it's probably to prevent light leakage, eh?

Yeah. I would agree.

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

In some spots it's way easier to just remove the tape where it covers the screw head.

[withalligators]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

Again, after you get it open, and I can repeat the process, I'd like the backlight strips from you. I don't know how else I'd ever get any, so getting them from you would be amazingly fortuitous.

Edit: I typed this before a ton of replies but didn't press post. This is awesome! I'm glad there are some screws holding it together under that tape. So, the tape might be a little structural, but it's probably to prevent light leakage, eh?

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

The tape surrounding the perimeter of the bezel needs to be peeled from all four sides to expose more screws.

[tom66]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

6000 and 6450 should be similar in construction, maybe one has different smart features or main board.

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

I've got it on my "bench" dining room table right now. There is no careful removal of the tape. It is stuck down firmly. I had to slice the tape with a razor. Before I strip this. I'm going to see what can be done to reassemble it and power it on.

[mmartell]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

withalligators and mmartell, I will be opening this set back up tonight and stripping it for parts. Let me know what measurements you need and I'll get the readings for you.

Oh and take pics !!!

[mmartell]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

I have the D6000 variant with a single 4-wire connector leading to the led's. I'm not sure how these are constructed so I wouldn't even know what measurements to ask for. But I am curious as to what this looks like inside

The four wires seem to be broken down into 2 pairs. One pair of wires measures a short. Not sure if that's normal or not.

[johnboy1313]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

withalligators and mmartell, I will be opening this set back up tonight and stripping it for parts. Let me know what measurements you need and I'll get the readings for you.

[withalligators]

Re: Samsung UN55D6450 turns itself off and on endlessly, no blinks

If I plug it in to AC with the power to main cable disconnected, there is a slight relay click. Then there is another about 5-10seconds after I unplug it. If I plug it in to AC with everything connected, the same relay click is audible, but then there is a much louder one everytime the backlights cycle on and off. Then, after I unplug it, there are continual relay clicks that lessen in intensity and increase in interval as the PS discharges over the course of maybe 20-30 seconds.

If I disconnect the main, the unit does nothing when I plug it in. I can get power throughout the board on different points, but I have no idea what I should be getting without the main connected. I do get the same readings across every transformer and cap on the inverter section of the board though, whatever that means.