I recently purchased a HP55 off Ebay.
The advertisement said it works fine but it doesn't.
Before I try to get my money back I'd like some advice in case I'm doing something wrong or else it is a simple problem to fix.
I don't have the manual but MOHPC site says to Press GTO 00
then move switch to programme and then press the sequence of keys.
I do this and the line (with 1 exception) reads "01. -15" for every entry.
The exception is that if I press GTO 1, 2 or 3.
What is going on??
HP55
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