The instructions below explain how to restore the HP 9G calculator to normal operation.
HP 9G Calculator - Resetting the Calculator
If the calculator is on but giving unexpected results, press MODE or CL/ESC.
If problems persist, follow this resetting procedure:
Press 2nd and RESET. A message appears asking for confirmation. (See Figure 1).Figure : Confirm reset action
Press the right Arrow key to move the cursor to Y.
Resetting to default settings
If the calculator locks up, and pressing keys has no effect, then perform a hard reset to unlock the calculator and return all settings to their default values:
Press EXP" and DEL at the same time.
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