Samsung ps50q97hd horizontal black lines

[Fool2cool]

Hi all,

Been fixing this Samsung and feel so close to the end now, it presented with the second buffer down on the top board as being blown and some FETs on the y main short, pretty much the common failure mode it sounds like.

I've repaired the Y main and replaced the blown buffer, i now have a picture but two horizontal lines across the screen, my question is, is there an easy way to know if it's just an unsoldered pin on my replacement buffer or if it's another buffer with issues, or is it the panel.

Cheers guys

[dick_barton]

Re: Samsung ps50q97hd horizontal black lines

Reseat the Ybuffer cables carefully. The ones in line with the screen lines,

[ReeceyBurger123]

Re: Samsung ps50q97hd horizontal black lines

Could be the Ymain still faulty loading the buffer down, or maybe your pins are not soldered enough ?

[freakaftr8]

Re: Samsung ps50q97hd horizontal black lines

Look carefully does it look like the buffer has replaced IC'S
on it?

[heavymachines]

Re: Samsung ps50q97hd horizontal black lines

It is replaced ic no doubt. take a popsicle stick and apply pressure to pins see if it improves.







I can see the pins are slightly misaligned and looks like bottom left corner pins look like it could be, not soldiered..

[freakaftr8]

Re: Samsung ps50q97hd horizontal black lines

That's a pin connection for sure then. Check your soldering

[Fool2cool]

Re: Samsung ps50q97hd horizontal black lines

Thank you all, it was a pin connection. I measured between each connector and ground for the diode value and found some pins were O/C. Re-soldered those pins and it was all great.

[freakaftr8]

Re: Samsung ps50q97hd horizontal black lines

Good to hear!

[ReeceyBurger123]

Re: Samsung ps50q97hd horizontal black lines

Told you Ive had that before so dont worry good fix