TCL 55S451 Blank screen

[x_orange90_x]

Capital M for megaohms, small m for milliohms.

Thanks for the clarification. I used my other meter and it displayed the capital M as well, but I did notice the readings started out in K ohm and climbed up into the M range. Is it okay then that they are reading that way or should I suspect an issue with one or more?

I still need to get a picture of the lines I blocked off on the ribbon. I didn't get a chance to do it last night.

[nomoresonys]

Capital M for megaohms, small m for milliohms.

[x_orange90_x]

And how do you determine that it shows Om, kOm, MOm?

I looked at the owners manual online and it doesn't help. That's all I know is it says ex. 5.00 M ohm

I thought that if they read anything other than OL they would be suspect and one bad can make others read bad when they're not. I have another older meter I try and see if it's different.

[lotas]

And how do you determine that it shows Om, kOm, MOm?

[x_orange90_x]

I can't understand what resistance is, what is it in megaohms, milliohms...?

Here is my meter:

https://www.innova.com/products/hand...10-megohm-3306

It's an auto ranging 10 MegOhm meter. It's "M" not "m" on my display, don't know if that helps.

[lotas]

Attached is a picture of the readings I got, going from the left side of the strip to the right. The caps not listed read OL. I'm guessing probably only one cap is bad but pulling down the others? I notice that all that read low are positioned in the middle of the strip instead of near the top where most of the others are.

I can't understand what resistance is, what is it in megaohms, milliohms...?

[x_orange90_x]

Well then, compare with the working strip what resistance they have on the capacitors, you just need to disconnect the cables going to the t-con. You may have masked more contacts than required, and now power is not supplied to the non-working strip, but I don't see what you masked there, maybe half of the cable is masked there.

You reminded me just now, I did check them on the working side and they all read OL.

[lotas]

Well then, compare with the working strip what resistance they have on the capacitors, you just need to disconnect the cables going to the t-con. You may have masked more contacts than required, and now power is not supplied to the non-working strip, but I don't see what you masked there, maybe half of the cable is masked there.

[x_orange90_x]

If none of the capacitors have low resistance (in Om), then they are fine, show where you masked the contacts.

Are those readings normal then despite the others reading OL?

I will try to get you a picture of what I masked off. It was on the main board side of the ribbon but that should't matter since I pinned the traces for continuity.

[lotas]

If none of the capacitors have low resistance (in Om), then they are fine, show where you masked the contacts.

[x_orange90_x]

Attached is a picture of the readings I got, going from the left side of the strip to the right. The caps not listed read OL. I'm guessing probably only one cap is bad but pulling down the others? I notice that all that read low are positioned in the middle of the strip instead of near the top where most of the others are.

[x_orange90_x]

Yes, now you can see that there are no protective diode assemblies here; you checked the ceramic capacitors for low resistance with the cable disconnected.

I don't think it was unplugged. I can recheck them.

[lotas]

Yes, now you can see that there are no protective diode assemblies here; you checked the ceramic capacitors for low resistance with the cable disconnected.

[x_orange90_x]

Yes, I'm interested in the very edge of this bar, what components are located on it.

Here are the pictures. The one with the black tape is the end you asked about.

[lotas]

Yes, I'm interested in the very edge of this bar, what components are located on it.

[x_orange90_x]

And you can see this entire bar; this chip is a spi flash.

I will get a photo of the whole bar later when I get home. Is there something specific you're looking for? I can try to get a close up of it if so.

[lotas]

And you can see this entire bar; this chip is a spi flash.

[x_orange90_x]

Post a photo in full, in good quality, of the faulty buffer strip and your photo, which contacts you masked.

Here's some photos of that side. I need to get another of the outside edge but this is a start. Also, I used my multimeter on continuity and touched one probe to CKV test point and the other to the pins on the ribbon. I determined it's lines 4-12 and blocked those off, that's how I got the grey screen on that side.

I also attached a screenshot of the pinout for that chip.

[lotas]

Post a photo in full, in good quality, of the faulty buffer strip and your photo, which contacts you masked.

[x_orange90_x]

Update! I disconnected the right side ribbon and got an image on the left side! I did this probably a dozen times before and didn't get an image but now I do. I checked all of the resistors on that sides scaler and they all tested good, and so did the caps. I pinned out the CKV lines and blocked them off but I just get a gray image on that side and the left side is fine. Is there something else that needs to be taped off along with the clock lines?