Tom/Roger, Thanks for your prompt replies.
I also have a PB140 of the same vintage (and from the same 'Dreaded Previous Owner') as the PB170, and its LCD has no problems. (I know it's also an active-matrix in the 170 vs. passive in the 140.) The backlight in the 170 is very bright - just like new and the LCD starts off looking 100%. The darkening occurs quite rapidly over about 15 mins. I thought at first it was due to heat from the backlight so I turned the b/l off and left it overnight, but the tunnel vision remained. Tom's theory of contamination sounds right to me, although living in Australia I have no way of getting the screen to you. I also presume it would be a destructive test to verify the theory? The aforementioned 'DPO' told me that the 170 used to refuse to startup properly so he heated it with a hair dryer and when it got warm it burst into life. I have later pinpointed this to a faulty power supply plug (the one that plugs into the PB) on the wall adapter - it had a hairline open circuit which closed when heated. I have no doubt that this heating has had an adverse affect on the LCD. Regards, ...Steve -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
