DLP TV: Left half normal, vertical 6" band center is gray, right half almost black. What's wrong?
Left half of screen projects normally. About a 6" gray band is in center vertically, and right half of screen is nearly black although picture is still visible. Problem began with 6" gray band restricted to right margin of screen, then darker band began as an equal width, and progressed toward mid screen.
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If you let me know in which location of the screen is located I can assist with the possible cause since the vertical line can be caused by different items based on where its located on the Screen such as center of screen, or far right side or midle of the right half side of the screen. Reply to this same post with where the line is located and I will assist you with it.
It sounds like you have Image burn in on your crt's. This happens when you watch programs in 4X3 mode. (The sides are blacked or grayed out and the picture is centered in the screen). The only way to fix this is to replace the crt's. I wish I had better news. Let me know if I can be of further assistance
needs a DM Board, prity easy to change yourself, if you order one, make sure you give them the version number off the Right side of the TV, will be somthing like SP01, To change - when you take the back off the tv, it will be on the left hand side, have to unplug 3 or 4 connectors, then take the plastic covering off, and it will slide out.
More than likely your akai has defective stk392-040 Convergence chips . it also may have open resistors generally 3.9 ohm flame proff. this board is attached to the top left looking from the back of the set it is screwed on by 1 screw black in the center . after installation this will probably half to be converged dinamically. which means you will half to get to the grid this is done by using the remote press mute 183 quicly to enter numbers on thew remote 2 to adjust red 4 to adjust blue horizonta 6 to adjustred vertical and 8 to adjust red vertical using center button to go up and down
It sounds as you desribe, the vertical output IC and or the b+ feed capacitor off the Hi voltage transformer feeding the vert. IC its required voltage. Not a really hard job to replace, but not for a handi person to do. This should be left to the professional, as there are no user serviceable parts inside this set and with the HI voltage and the safety issues its best to call somesone to assist you with this repair. Good Luck