[Ti] Keyboard marks screen

[Jeffrey K. Lew]

>
>We constantly hear of the marks being grease. But it seems to me 
>that if the hard keys touch the screen closely enough to transfer 
>grease, some incidental pressure could cause scratching or 
>indenting, as well.
>

The pressure of the keys against the screen certainly is an issue. 
I've seen the damage as far back as the Wallstreets, which supposedly 
does not have the key-marking problem of later, slimmer models. The 
most prevalent damage is a short, horizontal abrasion line in the 
middle of the screen, corresponding to the lower edge of the spacebar 
(on the Wallstreets, it will look like a blemish on the screen when 
it's not lit). On my Ti400, I have the pits and scratch from the 
spacebar, and I also have a patch of slightly lighter pixels  where a 
corner of the spacebar would hit the screen. That would be something 
a sheet paper will not protect against.

An interesting side-effect of the screen protectors is this: for a 
while, I used a thin sheet of styrofoam padding, like the one that 
comes with a new Powerbook. Since I did not pay much attention to the 
orientation of the sheet when I put it on the keyboard, both sides of 
the sheet were more or less equally exposed to the keyboard. 
Eventually, a keyboard pattern of grease developed on the screen, 
from the grease transferred to the styrofoam sheet that was then 
"printed" onto the screen.

Jeff Lew