I've had my calculator for years and use it frequently. Today, an area of keys - specifically "0", "1", "4", "7", ",", "sin", "apps", "x^2", "(", ")" stopped working. All other keys work fine. I've tried restarting, system reset, and changing batteries. I don't know if it's possible water damage (I have cats) or something else.
crwdns2934109:0crwdne2934109:0
crwdns2934065:0crwdne2934065:0: 3.5crwdns2936485:0crwdne2936485:0
14
13
7
If a column of keys stops working that typically means it's a hardware problem. You might have success taking the calculator apart and cleaning the button side of the circuit board with isopropyl alcohol.
However, it's likely you'd also need to do a board level repair using soldering equipment. Water damage and corrosion can certainly cause issues like this.
crwdns2934105:0crwdne2934105:0
crwdns2936751:024crwdne2936751:0 0
crwdns2936753:07crwdne2936753:0 1
crwdns2936753:030crwdne2936753:0 3
crwdns2942667:0crwdne2942667:0 23
