755CX screen diagnostic?

[phr@netcom.com (Paul Rubin)]

Thanks for the mention of the 640x480 755CX.   IBM Direct did
mention that unit (it is $4199 and also has no DSP and has
a NiMH battery instead of Li) but the $4655 unit definitely has 800x600.

I'm wondering if the 800x600 755CX comes with any kind of diagnostic
that tests R, G, and B on all 800x600 pixels.  Do those of you
with these screens have (m)any bad pixels?  Do they bother you much?
If there's no built-in diagnostic, anyone know where I can find one
elsewhere?  Thanks much.