I have an old HP48SX and the ON button works sporatically. Any idea on how to fix this? I've tried opening the case to see how the button is connected but I can't even get that open. Please help, this thing is driving me nuts.
http://www.math.uiuc.edu/~handuong/hp48/open
http://www.math.uiuc.edu/~handuong/hp48/repair
Edited: 19 July 2006, 3:58 p.m.