Re: Date & Time disappear on WP 34S Message #14 Posted by Geoff Quickfall on 9 Dec 2012, 2:08 p.m., in response to message #12 by Marcus von Cube, Germany
Had a similar problem with reset and restored messages at power up. In my case discovered in both machines that the battery/batteries would drop off the circuit due to weak battery spring tabs.
Any short jolt, like placing the calc on the table would cause the battery to disconnect. Putting it in my flight bag would result in restored messages..
Fixed it by ensuring the calc case screws were tight and by installing two thin shims on the battery tops. Made mine by folding a small sheet of paper twice (four sheets thick).
When the battery hatch is slid closed it firmly presses the batteries into the contacts. Also bend the contacts upwards.
This may help.
Geoff
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