Chosen Solution
Changed batteries but won’t turn on. What can I do?
Try these steps… Open your calculator and remove the logic board Inspect the logic board, especially around the connectors and look for corrosion.Inspect both sides of the board. Put your board in a container with >90% isopropyl alcohol and let it sit for a while.Use a soft brush, like a toothbrush and lightly brush away any corrosion you see.Rinse in alcohol and repeat.Let it air dry for a day.Re-assemble and hope for the best.
