Vertical lines Have an RCA dlp. The bulb went out and we've replaced it. Now, vertical lines across the screen come and go. At times they are barely visible in black color(almost in the background and just a few), at other times they are all across the screen and bright white. Then, they will just go away. Does anyone know what this could be?

You need to clean the lenses in front of the light bulb and clean out the inside of the light box too

Vertical scan section circuit fault. Check and replace damaged component/s at its vertical scan output section circuit. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Check and replace all the electrolytic capacitors {5 or 6 of it} at its vertical scan output section circuit. Replace all at one time. be sure about the polarity of these capacitors when replace it. As you know, all electrolytic capacitors have both +Ve and - Ve terminals, must coincide with to that the marking at the PCB. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/Pull up older posts.

Vertical output circuit is no good if the lines go from right to left.
If the lines were vertical then the horizontal output is to blame.

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Hi,If you are experimenting vertical lines ,color distortion,pixilation,or white dots on the screen you might be having an issue with the Dmd chip.This is how the DMD chip works: http://electronics.howstuffworks.com/dlp1.htm Basically the dmd chip is composed of around 2 million pixels that create the image on the screen.You will need to replace in order to fix your problem.Have a blessed one!

reset the settings to factory reset. the resolution is not syncing up.

YOU NEED CHECK THE 3 CRYSTALS ( RED, GREEN AND BLUE). CLEAN IT WHIT "DUST REMOVER" ( compressed gas duster) AND REPLACE THE COLOR WHEEL.

This is djb1 who commented above on the vertical lines that have gotten progessively worse. I may have found a potential solution. I unplugged the TV, took the back door off where you replace the lamp, took the lamp out, changed our vacuum from a vacuum to a powerful blower and blew ALL visable dust off anywhere that I could. I paid special attention to the heavy dust that was on the TV blower fan blades and around the mirror. I also held the blower on the outside of the TV on the vents around the lamp door.

After I plugged the TV back in, the lines have disappeared. We watched TV last night for about 2 more hours and the vertical lines never came back. So far this morning, the lines have not come back and it has been a couple hours as well.

It's worth a try. The free solution may be as simple as clearing out all dust. LET'S HOPE IT'S A PERMANENT SOLUTION!!

Get DMD board part # and shop for best price.......
I will do the same......let me know.....T.

Clearly shows problem in deflection area both horizontal and vertical section. Horizontal lines is due to vertical section problem and making bbzzzz is due to horizontal output transistor short and sometimes LOT SHORT.