So the PVM-14L5 I recently purchased is definitely messed up, likely permanently and definitely before it got to me. I tried some Wii VC games and the 240p test suite and was really disappointed. The colors are uneven and poor, there are a few hot spots of distorted color, almost the entire left side looks desaturated and the overall screen had subtle, coarse vertical streaks like the screen was grimy. I tried cleaning it and realized it was not the glass. It's like the display is dying. It's a pretty recent 2005 model so whoever had this unit really screwed it up. I'm returning it soon.
I did careful research and bought "good" versions of several retro consoles that are on their way and thought I had made a big mistake getting into this CRT gaming stuff. Even with the 14L5's imperfections, I had tweaked the service menu settings where I figured it should look at least partially decent in a few games, but it did not. Where were the wonderful scanlines (too faint) and the amazing picture quality I was seeing from others in the scanline thread? Were those pics exaggerated? RetroArch on the big TV looked so much better.
Well, I found a PVM-20M4U locally, $20 untested but with receipt and guarantee I could return or exchange it for another monitor. I wouldn't have passed it up at that crazy low price even without the return policy. I tested it out back home and feel relieved and elated that the picture looks undamaged and fantastic. My doubt about all of this CRT gaming is gone. I ran the suite again. All the obvious stuff but a bit of upper right corner geometry was tweaked to near-perfection as my eyes saw it. Super Mario World through 240p component in Wii VC looks very sharp and vibrant. The scanlines are prominent enough to add that charm everyone talks about and the screen size itself is perfect compared to the 14" model.
I own a quality plasma and still this looks so uniquely different in a really good way. It feels much more responsive with the instantaneous display and input response that playing on the best emulator on the plasma looks and feels so gross in comparison. I just got started but it was definitely worth the investment.