Potentially, the batteries are very weak, and you might just need to change them out (4 AAA's). More likely, I think there is something defective with such a calculator. Depending upon how long ago you purchased it, it is possible of getting it replaced. The following is Texas Instruments service rep contact info from there website (as of: June 17th, 2010).
TI-Cares Customer Support Contact a TI-Cares Customer Support representative via e-mail or phone to order products, inquire about issues, or ask general questions about TI education technology.
1-800-TI-CARES (800-842-2737) Monday - Thursday: 8 a.m. - 7 p.m. Central Time Friday: 10 a.m. - 7 p.m. Central Time Contact TI-Cares Support
Answers & Comments
Potentially, the batteries are very weak, and you might just need to change them out (4 AAA's). More likely, I think there is something defective with such a calculator. Depending upon how long ago you purchased it, it is possible of getting it replaced. The following is Texas Instruments service rep contact info from there website (as of: June 17th, 2010).
TI-Cares Customer Support Contact a TI-Cares Customer Support representative via e-mail or phone to order products, inquire about issues, or ask general questions about TI education technology.
1-800-TI-CARES (800-842-2737)
Monday - Thursday: 8 a.m. - 7 p.m. Central Time
Friday: 10 a.m. - 7 p.m. Central Time Contact TI-Cares Support