Answer to: Need to find a manual for my ThinkPad T41http://download.lenovo.com/ibmdl/pub/pc/... i hope this manual will work for you... for more info please go to http://www-307.ibm.com/pc/support/site.wss/migr-46464.html
Answer to: Going from a 256mb card to 8G & camera.the main issue here is that the maximum external memory ( here sd ) supported by this cam is 2048kb or 2 gb. if u use an 8 gb card ,it may detect the card but there are possibilities that the entire system may hang or your camera may use only 2 gb of available 8gb/ you can test this. borrow a card from the vendor from whom u bought the 8gb card , preferably another 4 gb or 8gb card, and try.im quite sure that the cam will show the same locked screen.
Answer to: What is the reed switch for?a reed switch is a sealed glass tube having ferrous contacts inside it.. these reed strips are stiff such that in the absence/presence of a magnet nearby it opens/closes thereby breaking/completing the circuitry... like bernie said we cannot close the strips with any mechanical arm or anything.