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crwdns2934241:0crwdne2934241:0 Mathnasium

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Step 1. Remove one AAA battery. Press & hold Clear button for 5 Seconds. Replace the battery and turn on.

if that doesn't work go to Step 2.

Step 2. Remove one AAA battery. Press & hold DEL button for 5 seconds. Replace battery and turn on.

if that doesn't work go to final step.

Step 3. Remove all batteries including the back-up battery for at least 5 minutes. After 5 minutes replace all batteries and turn on

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open