I bought a Mitsubishi XC-3717C a while back that was very blurry.
I adjusted the focus controls and it is a lot better now but whenever I turn the monitor on or change resolutions the image becomes blurry, dim, and unstable. Sometimes if it gets really bad I can see little sparks on the back of the neckboard.
After a while it gets better, but still intermittently goes dark and blurry for second or two every 30 seconds or so.
It seems the longer I leave the monitor on in the same resolution the less this problem presents itself. Still, I would like to fix it. Every once in a while I can see it get bright and clear, and when it does that it looks absolutely amazing. I want it to do that all the time.
I talked to a technician at my local repair shop, Bobby Jones Electric and described the symptoms to him. He recommended trying to rejuvenate the picture tube, but also warned that this could destroy the tube.
What do you guys think about this option? What are some other things I should look at or try first?