Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

[patrax]

Powers up backlights ok. first pic is at startup, second pic is 15 seconds in, third is about a minute in. Menu button brightens screen as does input,vol.chan + -.The patterns and lines grow from l-r-r-l Caps all look good. 24v 12v 5v all good on Psu. Pico fuse on T-con checks good. I do have a voltage drop on one Ic on the T-con, I believe it's the 3v one. Heating/cooling T-con = no change. Just want to see if anyone thinks its tab bond failure before I go any further. Re-seated and cleaned all ribbons and Lvsd cable =no change. Twisting the frame has zero effect as I know this is a Chi Mei panel my hopes are not too high. and I don;t know if there is sound with no Osd to go by. Any advice would be great.

[patrax]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

Bump: Anyone? tab bonds? or T-Con? Tearing my hair out on this one. Perhaps I should have given everyone more time but its taking up a lot of my precious workspace . Sorry if I am jumping the gun. My bad.

[budm]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

Check the voltage regulator IC voltages on the main board yet, may be similar to this one:
https://www.badcaps.net/forum/showth...755#post420755

[patrax]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

Ok thanks will check the output on them also. Just now noticed that hardly any parts are available as far as replacement boards so it looks like I have to track down the offending Ic and try to replace. Just has me stumped as it really looks like a T-Con issue. Thanks

[budm]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

I m not 100% sure to the exact cause of the problem but voltage verification will be the first thing to check. Post pictures of the T-CON board so we can see the regulators.

[patrax]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

T-Con Pics

[patrax]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

I m not 100% sure to the exact cause of the problem but voltage verification will be the first thing to check. Post pictures of the T-CON board so we can see the regulators.

So what should I be testing? This is a different animal to me. I see two regulator IC's I believe but kinda in the dark on procedure. Just need a little guidance. Thanks.

[truep]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

I had a Sony with similar problems. It had A bad cap on the power supply 12V rail. New cap got rid of the ripple, but didn't fix it. Neither did a TCON. It was the main board, probably damaged by the excessive ripple on the 12V line. BTW, if you find one bad cap, replace all on the "cold side" with Panasonic FR, FC, or

[patrax]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

Unplugging ribbon cables from T-con output produces a perfect white screen all the way across no lines at all. I have ordered the PMIC - Voltage Regulators - Linear (LDO) for the T-con(IC REG LDO 3.3V 1.5A SOT223)and( IC REG LDO 2.5V 1.5A TO263-3) as I suspect now more than ever they are bad. Th Ps seems to be outputting correct voltages. Everything but the LDO'S are checking out. Also this board appears to be scarce as far as replacements go (part # CMO 35-D033602) all I can find is the reman- "send us yours we will fix it and send it back" deal and it's the same cost as a replacement board. So I'm going to take my chances with a 10$ regulator replacement and see what happens. There is so much info here that it can be overwhelming but thats a great thing, I have found threads of a completely different set model with the same internal parts that have failed .Everyone has given me lots of insight from many directions and its much appreciated. Now just have to wait a few days for parts to see if I can get this "splinter under my finger nail" Lcd fixed and outa here.

[patrax]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

Did not fix this by replacing Ic's. I am at a loss on this one, anyone? have any luck?

[patrax]

Re: Insignia NS LCD 47HD-09 another vertical moving lines/grids issue.

Still got this pos and its still giving me fits anyone have a similar exp? Let me know. Ldo's are checking out I just don't know about this one.