HP48SX non responding


My HP 48SX is not turning on beside a replace all the batteries for new ones. I follow a procedure that on the owners manual. Does anybody knows what could happen and i could do for troubleshoot this problems?

Thanks in advanced for any suggestion



Try leaving the batteries out, and playing with the keys (should completely drain any capacitance power). And there's a reset button underneath _one_ of the rubber feet (I don't know which one, have never gone down this particular path) that you can use a paper clip on (hopefully another will post more on this procedure). Otherwise, I may have a 48S for sale....

Good Luck!




facing the back "label", it's the top-left rubber feet. It's easily removed by using your own finger nail. There is a small hole with a little "R" closed to it. Now, paper clip, a bit press for about ten seconds and [ON] [A] [F] together; that's the master clear, and it's the best recovery procedure.

Also, check batteries polarity... Who knows?



On my older 48SX it's the top-left foot, but on my newer 48SX (and I guess all 48G series), it's the top-right foot. Look for the letter "R" next to the hole. The "hardware reset" by itself forces a warmstart; useful when things are so fouled up that [ON][C] together won't do it.

It wouldn't hurt to check that the batteries are actually good. I once had a bad experience replacing low "N" cells in a 28S with new ones, and found that the new batteries were almost completely dead; not even enough power to retain memory. I doubt that that would happen with "AAA" cells, but if there are children around, they might replace the batteries in their toys and put the old ones back in the box.




You're completely right! I forgot that changing. I just took my HP48SX and checked for the hole.

Thank you!

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP41 emulator for HP48sx - keyboard overlay needed Doug (NYC) 3 939 12-31-2012, 03:11 PM
Last Post: Allen
  HP48SX seems fully functional won't run SELF TESTS? Bruce Larrabee 5 1,186 07-16-2012, 11:04 PM
Last Post: Luiz C. Vieira (Brazil)
  HP-48G not responding Walt 3 965 05-20-2012, 08:03 PM
Last Post: Allen
  HP 31E buttons not responding Adam Vaughn 5 1,096 06-12-2011, 10:58 AM
Last Post: Michael de Estrada
  Did We Miss The 20th Anniv. of the HP48SX? Jake Schwartz 6 1,104 03-19-2010, 05:55 AM
Last Post: Bill Zimmerly
  HP48SX accuracy questioned. Pal G. 3 877 09-10-2009, 09:01 PM
Last Post: hugh steers
  HP48SX LCD problem... Geoff Quickfall 4 1,593 08-16-2009, 04:35 PM
Last Post: NACHO
  Kermit K95 ver 2.1.3 GUI and the hp48sx Mike Reed 6 1,190 01-28-2008, 11:37 PM
Last Post: Mike Reed
  HP48SX case removal Ryan 1 443 07-19-2006, 03:58 PM
Last Post: Han
  HP48SX with black LCD (photos inside) Han 3 819 06-02-2006, 04:02 AM
Last Post: Han

Forum Jump: