LCD rot?

From: pye at mactec.com.au Subject: LCD rot? Date: Fri, 26 Jul 2013 23:01:03 +1000 To: cctalk at classiccmp.org I have just pulled a heap of old Apple PowerBooks and Newtons out of storage, and have discovered that quite a few of the LCDs that were perfect last time I looked at them (some probably not for seven years ago now) have deteriorated to the point that they are no longer usable. Problems vary from big black splotches on mono screens, to colour screens with almost the entire display from the centre out showing only the backlight. What are the causes for these kind of problems? Heat? Humidity? They have been stored for the last six or seven years in a cool dry environment, but did spend one summer in a storage facility that could have reached 40 deg c at times. Chris