Hello:
I have an HP-42s that gives the following keyboard error in the self test: "KBD 02501", and then it says "FAIL 00020". The keys are very sticky due to something being spilled on it. (I am not the original owner). Can something be done about this? Is there a way to take apart the calculator to service the keyboard and clean it up of the dried up soda that probably caused all this?!?!?!