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HP 42S not working anymore. Literally was using it 2 hours ago and when I turned it on I got this. Can someone help? : r/calculators
HP 42S Scientific Calculator for sale online | eBay
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HP 42S Scientific Calculator for sale online | eBay
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![Numeric Integration - HP -42S Manual [Page 25] | ManualsLib](https://static-data2.manualslib.com/product-images/8/713/71282/raw.jpg "Numeric Integration - HP -42S Manual [Page 25] | ManualsLib")
Numeric Integration - HP -42S Manual [Page 25] | ManualsLib
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