Insignia plasma n2-42p650a11 black horizontal lines

[jmandawg]

Hi I picked this up on the side of the road. It has black horizontal lines on the display. It's it repairable?

I looked for bulging caps but didn't see any.

Thanks

[jmandawg]

Re: Insignia plasma n2-42p650a11 black horizontal lines

I tried to reseat the connecters but it made no difference.

[Biruslapio]

Re: Insignia plasma n2-42p650a11 black horizontal lines

Test the Y-buffer output pins to the panel, they cannot be open nor shorted, where there's these lines, if it's a buffer fault, they would be open, infinite resistance.

Put multimeter in diode mode, the positive probe on the buffer's floating ground, negative on the output pins, should have a forward voltage of 0.7~1.2V.

[jmandawg]

Re: Insignia plasma n2-42p650a11 black horizontal lines

I went across all the pins and they all show around .739v.

[Biruslapio]

Re: Insignia plasma n2-42p650a11 black horizontal lines

If there's .739V on the same pins as these horizontal lines, I say it's a panel problem.

[jmandawg]

Re: Insignia plasma n2-42p650a11 black horizontal lines

Yeah I double checked them so that makes sense. Thanks for the help.

[dick_barton]

Re: Insignia plasma n2-42p650a11 black horizontal lines

It may be woth your while to search the forum on how to do a self test

[mmartell]

Re: Insignia plasma n2-42p650a11 black horizontal lines

That's a Ybuffer problem. If you can get a working set cheap replace them. Or replace the buffer ic's responsible for those portions of the screen.

[dick_barton]

Re: Insignia plasma n2-42p650a11 black horizontal lines

It certainly does look like a Y buffer problem. I would repeat the buffer testing.
https://www.youtube.com/watch?v=V6hxf9sARMY

[jmandawg]

Re: Insignia plasma n2-42p650a11 black horizontal lines

Yeah my board looks just like that. I did that test a bunch of times and didn't get any shorts which seems strange.

It looks like a replacement board cost more than the TV is worth so will prob just trash it.

[jmandawg]

Re: Insignia plasma n2-42p650a11 black horizontal lines

Actually There are some used ones (untested) on ebay for $20 or a "new" one for around $35. Do you think it's worth the gamble to see if it fixes it?