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**blobula** · 11-08-2013, 08:37 PM

Re: Insignia NS-50P650A11 clicks

Here is some information very similar to my problem. Very well could be the same thing.

Perhaps this may help someone else.

http://www.justanswer.com/tv-repair/...unplugged.html

**capkid** · 11-08-2013, 09:16 PM

Re: Insignia NS-50P650A11 clicks

It's not impossible that the power supply (PSU) is bad, but it could very well be the Y-main or X-main that's faulty. The justanswer.com post doesn't show a definite resolution to the problem. I'd try disconnecting the X-main from the Y-main and the PSU first to see if the clicking stops. If it does, don't reconnect the X-main, as you risk damaging the Y-main.

Edit: If you have a multimeter, you can check the VS and VA voltages that leave the power supply. Let us know if you need more detailed instructions.

**blobula** · 11-09-2013, 01:56 PM

Re: Insignia NS-50P650A11 clicks

Thanks for the response. Yes, I believe I'll need some additional instructions on this.

So the Y-main is the board on the left attached to the PSU in the middle. The X-main is the board on the far right attached to the PSU.

If I disconnect the X-main from the Y-main and PSU and the clicking stops what does that indicate to me? That the X-main is bad? If the clicking doesn't stop and I can't reconnect the X-main do I then disconnect the Y-main from the PSU?

**capkid** · 11-09-2013, 03:44 PM

Re: Insignia NS-50P650A11 clicks

(1) If the TV turns on with sound when you disconnect the X-main, you most likely have a faulty X-main. I'd replace the X-main and the tiny buffer board to the right of it.

(2) If the TV does not turn on with sound when just the Y-main is connected, you most likely have bad Y-main and X-main. My recommendation at that point would be to replace the Y-main, Y-buffer (long board to the left), the X-main, and the X-buffer.

A multimeter might useful to check the VS and VA voltages leaving the power supply. There should be a couple test points marked as "VS-TP" and "VA-TP". Also, the label on the back of the panel to the left of the X-main lists the voltage specs.

Edit: If during your testing you find that your results match any of the scenarios I mentioned, I can show you how to quickly test a board's components to truly determine whether the board is bad.

**blobula** · 11-09-2013, 05:49 PM

Re: Insignia NS-50P650A11 clicks

I disconnected the X-Main from the Y-Main and plugged it back in. I received the same results of three clicks and then nothing. The red light stayed illuminated afterwards on the front.

Pic showing X-main disconnected from Y-main

Should I disconnect the Y-Main now and try again? That would mean both X-main and Y-main are disconnected.

I'll have to see if I can get my hands on a voltage meter tonight. When I got this tv the person I received it from said their testing showed the PSU was bad. However I don't know the results of that testing which led them to that conclusion.

Thank you

**capkid** · 11-09-2013, 06:07 PM

Re: Insignia NS-50P650A11 clicks

Yes, I would disconnect the Y-main. The PSU in these TVs rarely fails, and I believe it goes into protection mode. This fools people into thinking that the PSU is faulty, since the output voltages drop, also.

**blobula** · 11-09-2013, 06:18 PM

Re: Insignia NS-50P650A11 clicks

I disconnected the Y-main and plugged it back in. The tv seems to boot up. No clicking or anything. I don't have this hooked up to anything so I can't confirm sound, but the screen does not have picture.

**capkid** · 11-09-2013, 06:22 PM

Re: Insignia NS-50P650A11 clicks

Yep, that's what I figured would happen. I'm almost certain that your PSU is fine. Ok, I'd recommend testing the X-main and Y-main components on the heat sinks with the two boards out of the TV to look for shorts. I'll post back with instructions in about 10 mins.

Edit: Testing the components will require a multimeter.

**capkid** · 11-09-2013, 06:45 PM

Re: Insignia NS-50P650A11 clicks

Ok, I've attached a pic of a Y-main from a similar TV. There should be a bunch of three-legged transistors and two-legged diodes on the Y-main's and the X-main's silver-colored large metal heat sinks. In diode mode on a multimeter, do the following:

Diodes: You're going to want to touch the red probe to one leg and touch the black probe to the other leg. Record the reading. Reverse the probes then record the reading. If any read 0.000, you have a short.

Transistors: The test is similar to the diode test, but you'll be alternating between combinations of the three legs. Again, if you see 0.000, you have a short.

Edit: If you find shorts, the board and it's buffer board should be replaced. These Y-mains and X-mains are not good candidates for component-level repair - trust me

Attached Files

**blobula** · 11-09-2013, 10:20 PM

Re: Insignia NS-50P650A11 clicks

What is the secret to detaching the Y-main from these connectors? I don't want to break anything by applying to much pressure. Can the readings be taken with the board attached?

Looks like I'll have to take the readings tomorrow as the multimeter I borrowed seems to be broke. Goodness.

**capkid** · 11-09-2013, 10:28 PM

Re: Insignia NS-50P650A11 clicks

I slip a large flat-head screwdriver in the area pictured then I CAREFULLY twist it. I believe I also removed the board screws prior to doing so; it's been awhile since I last worked on one of these Insignias. You might be able to take the readings with the board attached, also.

Attached Files

**blobula** · 11-09-2013, 10:36 PM

Re: Insignia NS-50P650A11 clicks

Awesome. Thanks so much for your guidance on this. I'll work on it tomorrow when I get a functioning meter and report back.

**capkid** · 11-09-2013, 10:38 PM

Re: Insignia NS-50P650A11 clicks

NP. I've subscribed to the thread, so I'll keep an eye out for your response.

**blobula** · 11-10-2013, 03:04 PM

Re: Insignia NS-50P650A11 clicks

Ok I was able to get a working multimeter.

Multimeter being used and set to the appropriate settings per pic I believe.

I was able to get the board out without any issues. I started testing each diode from left to right at each screw location. (8 of them)

The transistor marked in your image gives me 0.000 when the probes are applied alternating. The diode as pictured in your image above gives me 0.000 with alternating probes applied. The other transistors and diodes give me a reading. Some are OL.

**capkid** · 11-10-2013, 03:08 PM

Re: Insignia NS-50P650A11 clicks

So, it looks like your Y-main is bad. Try the X-main, also.

**blobula** · 11-10-2013, 03:24 PM

Re: Insignia NS-50P650A11 clicks

I tested each diode and transistor on the x-main with alternating probes and none of theme went to 0.000 although one diode did get to 0.001.

**capkid** · 11-10-2013, 03:32 PM

Re: Insignia NS-50P650A11 clicks

That one diode on the X-main would concern me, and I'd declare the board bad. Ok, so it appears that you need to replace the Y-main, Y-buffer, and the X-main. The small board attached to the X-main is probably ok as-is, but you'll want to check some of the components in a similar fashion. Post a pic of the small board if you're unsure of how to test them.

Regarding replacement boards, Shopjimmy.com is your best bet. They offer a 6-month warranty on their parts. Not including shipping, it would be around $85 for the Y-main, Y-buffer, and X-main. eBay has quite a few of the same parts for around $60 total. I'd personally spend the extra money for a little peace of mind.

Edit: The Y-buffer may also be ok, but I've never found a reliable way to test those. If you don't replace it, you could fry your replacement Y-main and X-main.

**blobula** · 11-10-2013, 03:45 PM

Re: Insignia NS-50P650A11 clicks

Thanks so much! If I start by replacing the Y-main and Y-buffer only and the tv works. Would I be in danger of harming those new boards as well if the X-main goes out later on?

I'll take a look at that smaller board and order some parts.

**blobula** · 11-10-2013, 03:48 PM

Re: Insignia NS-50P650A11 clicks

Just to verify these are the parts I'd need.

http://www.shopjimmy.com/samsung-bn9...main-board.htm
http://www.shopjimmy.com/samsung-bn9...main-board.htm (they say a firmware update is needing to be applied to help avoid having this part fail) You familiar with this?
http://www.shopjimmy.com/samsung-lj9...scan-drive.htm

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