Samsung PN50B450B1D showing evenly spaced vertical lines

[205rogers]

When I first turn my TV on, it works fine for a few minutes and then the attached vertical lines show up across the screen. If i turn it off and back on same thing, works for a few minutes then the lines come back.
I have read other posts about the T-con PWB. Not sure if thats the problem with mine or not. Hoping to get some advice. Thanks

[tvtimmy]

Re: Samsung PN50B450B1D showing evenly spaced vertical lines

Do the lines cut through the menu box when menu button is pressed?

[205rogers]

Re: Samsung PN50B450B1D showing evenly spaced vertical lines

Yes. They are always there.

[tvtimmy]

Re: Samsung PN50B450B1D showing evenly spaced vertical lines

Ok. Remove the ldvs cable that goes from the mainboard to the control board. Its usually a flat wire. On the control board there is 4 pins. Take a harddrive jumper( for choosing master, slave, etc.) and put it on pins 3 and 4. Plug tv in and look at the test patterns on the screen. If they look good your mainboard is bad.