„If the calculator responds to keystrokes but you suspect that it is malfunctioning:

1.Do the self-test (described below). If the calculator fails the self test, it requires service.

2.If the calculator passes the self-test, it is quite likely you’ve made a mistake in operating the calculator. Try rereading portions of the manual, and check “Answers to Common Questions” on page 222.

3.Contact the Calculator Support department.

A: Assistance, Batteries, Memory, and Service 231

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