TI-58C Display Problem

[burkhard]

(11-21-2018 06:52 PM)KeithB Wrote:  

(11-20-2018 09:43 AM)DANTONVB Wrote:  I just bought another TI-58C, in almost new aesthetic condition.

Then I cleaned the battery residues in the calculator PCB, using vinegar and after rinsed with water, and soldered new battery contatcs.

Thanks, Danton

Isn't the corrosion acidic? shouldn't you clean it with something like baking soda to neutralize it?

I believe that dry cell batteries (including old Ni-Cad) use an alkaline electrolyte, hence a weak acid (like white vinegar) is what you want to neutralize with. Baking soda would be the ticket for lead-acid batteries.