HP 39GS HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 44
Check the battery compartment. Are any of the metal contacts broken or out of place? Are
UPC - 808736931328
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• Take the batteries out, including the round backup battery. Press and hold the ON button for 2 minutes to remove any possible remaining power from the internal capacitors. Leave the calculator overnight and re-insert fresh batteries. • If this happened when running a game or aplet that you've downloaded from the internet then consider that this may be the source of the problem. Backup anything that you want to keep to the PC and do a full reboot to restore factory settings. • Try a full reboot using ON+SK1+SK6. Some less likely options: • Did the paperclip feel funny when you inserted it? There should be a very subtle sensation of 'pressing a button' as the paperclip shorts out the batteries momentarily. Could you have accidentally bent the shorting contact last time you used a paperclip so that it is permanently shorting out? • Check the battery compartment. Are any of the metal contacts broken or out of place? Are the batteries firmly in contact with all of them? Is anything out of place? Do any of the batteries or the metal contacts show corrosion? If so, clean them carefully, being careful not to get moisture inside the calculator. • Have you recently dropped the calculator or spilled liquid on it? If so, this is not good. It is probably permanently dead. Did you need a very expensive paperweight? • Check the USB and Serial ports at the top of the calculator. Do they have anything wedged in them courtesy of a young child perhaps? 44