Hello, This is not entirely true Adam. I have done extensive reliability tests on LCD. It is quite normal that the BACKGROUND turns darker. By adjusting the contrast voltage you can achieve a little or worsen it more. Normal LCD's are tested within their operating temperature by the manufacturer on sample basis. In 3 weeks they change all environmental settings. for example : In Cycles of 20 minutes they go from -25 to +85 with humidity of 50%. It is not in your mail wat kind of LCD's you have, but LCD with the LCD driver on the glass will suffer more. Normal LCD suffer also. When the condictive material is not isolated and will therefor oxidate. Do not be alarmed with tha above. In this environment I would choose an other type of display. grtz, Simon ____________________________________________________________ Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu