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Some time ago I noticed my Clie had some annoying diagonal streaks on the screen. The person who sold it to me insists he didn't have the problem, and I don't think I recall seeing them until I'd owned it for some weeks. It doesn't impair the operation of the PDA, and I mostly read eBooks, but I'd still like to know what causes it and if there's a fix. Some Googling around hasn't shown anyone else with quite the same problem, so I thought someone from the extraordinary AF community might have an idea 
Attached is a photo and a scan of the screen. The contrast has been turned up to make it more obvious, but the pattern remains the same regardless of contrast setting, backlight on/off etc...
The left picture is a little misleading, the scanner makes it look like it has lots of horizontal lines. Those aren't the problem
did you take off the plastic screen protector that came with the unit?
Yeah, some cheap screen protectors do that. You will want to take off any bit of plastic on the screen.
Yes, yes... of course I took the screen protector off. There's definitley nothing on the screen
Install AfterBurner and try fiddling with the LCD/n and LClk/2 settings.
Even so, most older LCD screens like that are effected slightly. All my palm V and VX's show it to a certain extent depending on what contrast setting I use.
Oh, if you get a colour palm its so my more easier to read ebooks...
On the one that it looks like Ex-parrot has (SJ20), it has a white backlight that greatly improves visability. But even then, it's no comparison to a colour screen.
What do these settings do?
Those are syncing and timing settings for the LCD.
Well, I managed to make the screen either flicker or get darker. Is that it or is there something I'm missing? (This was just playing with the two LCD options more or less at random)
You can also try the no-streak hack for the hack manager your using to run afterburner. Ive had more sucess with that...i'll try to find it for you as I dont think its published any longer.
With afterburner, make sure 0-ws core, fast mpx, and fast page is on at least as this gives an excellent speed bump for free without overclocking the processor. These functions just patch bugs in the palm OS. You will notice a large speed bump in any benchmark program.
Here you go:
http://www.harbaum.org/till/palm/nostreak/nostreak.zip
Hope it works
Just makes the screen flicker
Oh well... it doesn't get in the way of actually using the machine.
Oh well, sorry about that. Clie's with the high res black and white screens were mightly odd beasts...i'm not sure how sony managed to get high-res support in palm os 4.