Needing help with my 48s



#7

My 48s is doing strange things. It started by entering both a 5 and a 6 when I tried to enter only a six. Then it went into a mode where I could not enter a zero. The batteries were low so I inserted a new set. I still get the inability to enter a zero and when I try several times in a row everything locks up.

I have tried all of the tricks on pages 665 and 666 to no avail. Any ideas would be appreciated.


#8

Soak it up to the screen in clean water for a day. Then leave it to dry for a couple of days. If it still doesn't work, go get another one, they aren't expensive these days.


#9

you really mean this? wow, so our calculator can actually take on water also? ;)


And yes, 48S are probably one of the cheaper old hp to get... I would actually get the 48G or GX if you don't want to get the 50G


Edited: 2 Sept 2012, 2:27 a.m.

#10

Quote:
Soak it up to the screen in clean water for a day. Then leave it to dry for a couple of days. If it still doesn't work, go get another one, they aren't expensive these days.

IMO, the first bit of advise is incorrect, the second, spot on.

A water bath will do nothing, you'll need the vibration of an ultrasonic cleaner and a surfactant cleaning agent to get the offending bits of conductive material out of the key dome areas. In the end, you may get a few more months or years of use out of the unit but ultimately, it is time to replace.


#11

worked once for me, after battery leakage. Not saying will necessarily fix it.


#12

Worked for me as well, after the cat spilled a flower vase with fertlizer liquid over my 48SX 12 yrs ago. I flushed it thoroughly in running water, shook out most of the water and dried it in an oven(!) It still works perfectly...


#13

[Of course, desiccation in a convection oven, NEVER in a microwave oven :)]


Possibly Related Threads…
Thread Author Replies Views Last Post
  SpeedBrowser / EQLib Browser for the HP 48S/SX Raymond Del Tondo 0 1,022 04-21-2013, 11:09 AM
Last Post: Raymond Del Tondo
  William Wickes briefly introduces using the HP 48S/SX Peter Murphy (Livermore) 11 3,208 10-28-2012, 09:46 PM
Last Post: Luiz C. Vieira (Brazil)
  I got help with my 48S Palmer O. Hanson, Jr. 0 1,045 09-09-2012, 07:13 AM
Last Post: Palmer O. Hanson, Jr.
  Re: Needing help with my 48s Reth 0 861 09-02-2012, 02:46 PM
Last Post: Reth
  Programs for HP-48S William N Strew 4 2,322 07-13-2012, 07:17 PM
Last Post: Eddie W. Shore
  ROOT bug? HP 48S/48G Eddie W. Shore 8 3,986 07-13-2012, 07:05 PM
Last Post: Eddie W. Shore
  Needing more advice with my HP-48S Palmer O. Hanson, Jr. 3 1,549 09-19-2011, 04:38 AM
Last Post: Bart (UK)
  Cell leakage in my 48S Palmer O. Hanson, Jr. 2 1,227 05-14-2011, 04:11 PM
Last Post: Katie Wasserman
  HP 48S Schematic ? Thomas Chrapkiewicz 1 1,019 03-09-2008, 11:07 AM
Last Post: Thomas Chrapkiewicz
  HP 48GX and 48SX and 48G and 48S and 48G+ Mad Dog ebaycalcnut 2 1,255 04-17-2007, 08:55 PM
Last Post: James M. Prange (Michigan)

Forum Jump: