Sick HP42S



#2

Virtually all function keys on the right column (+, -, x, /) have stopped working. In addition, this evening powering-up became sporatic. Is there an easy fix for this?


#3

Sounds like a loose connection to the matrix keypad.

#4

Press down just under the LCD panel above the top row of keys.

While pressing at this point depress the faulty keys. They should work. If so it is the physical connection between the keyboard pca and logic pca via the flex pcb. This means the foam pressure pad completing the connection is desintigrating and needs replacement.

Only way is to enter the calculator.

Got to go to work.

Cheers, Geoff


#5

That did it Geoff. Thanks for the tip.

#6

That solution worked for a HP40G which doesn't want to switch on.

Apart from opening it up to change the foam pad, any tips for the repair ?

Thanks in advance, Nicholas


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP42S John Mosand 5 644 07-22-2012, 03:13 AM
Last Post: Les Koller
  HP42S graphics Han 2 427 07-20-2012, 12:23 AM
Last Post: Raymond Del Tondo
  HP42s ROM aurelio 18 1,941 06-26-2012, 09:36 AM
Last Post: Thomas Klemm
  x root y on hp42s David Griffith 14 1,121 04-08-2012, 12:43 PM
Last Post: Walter B
  HP42s - deal? Cristian Arezzini 26 1,791 02-19-2012, 10:05 AM
Last Post: Cristian Arezzini
  HP42S Dwight Sturrock 4 481 03-31-2011, 11:21 PM
Last Post: svisvanatha
  Sick HP40G Nicholas Cole 0 202 03-18-2010, 03:08 AM
Last Post: Nicholas Cole
  Sick HP42S Chuck Galloway 2 335 03-17-2010, 11:46 PM
Last Post: Geoff Quickfall
  HP42s Programming Mark Harvey 16 1,171 08-14-2008, 09:37 PM
Last Post: Ron Andrade
  New HP42S ce25593 6 580 06-30-2007, 02:26 AM
Last Post: Seth Morabito

Forum Jump: