Hi,
If the calculator has locked up you should perform a reset.
- Press and hold the [C] (ON/OFF) key
- Press and hold the [LN] key (third key from the left on the top row).
- Release both keys simultaneously. T
- The calculator should display "0.00" (if the number of decimal places is set to two.)
If that does not bring it to life you should perform a full memory reset
- Press and hold the [C] (ON/OFF) key.
- Press and hold the first key from the left ( the
Square root x key) and the first key from the right (the SIGMA+ key )
on the top row.
- Release all three keys at the same time.
- Calculator should display "ALL CLr".
- To clear the message press the [C] (ON/OFF).
- The calculator should display "0.00."
If the calculator does not respond as expected,
- Remove the batteries, and
- with a metallic coin (and what coin is not metallica) short-circuit the calculator's electrical terminals.
- Maintain the coin for about ten seconds.
- Replace the batteries (preferably fresh ones) respecting the diagram inside battery compartment.
- The Calculator should display "ALL CLr".
- To clear the message press the [C] (ON/OFF).
- The calculator should display "0.00."
If the
calculator does not respond to the foregoing procedures, remove the
batteries and leave them out of the calculator for 24 to 48 hours to
drain capacitors.
If it continues to malfunction, it will need
to be repaired. One repair shop in Pennsylvania, USA has a website at
http://www.fixthatcalc.com
Here is the link . You should contact them.
Hope it helps.
Thank you for rating the solution.
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