Dear All, in primis sorry for the bad quality of the pics ...
I'm restoring an HP55. I knew it was a difficult one, but I couldn't resist since it was a cheap one.
The good news (one...) : it works !!!
The bad news(list of...) :
The labels ... It is missing front and back label, which at least for the back label shouldn't be too difficult to get.
Does anyone know a good source for front labels ?
Then the keyboard ...
The top row has partially been transplanted from an HP45, and I think that the only way replace them is to find an HP-55 donor,
all of other classics are not suitable, I was thinking about the HP67
but I should be banned from the forum for having forgotten the obvious differences from the two keys shapes...
Then the display ... the second group of leds is much brighter than the rest of the digits, any hint on why this can happen ?
Could it be the controller ?
Then the switches ... the calc was without, and I had a spare set from an old HP67. The on/off works quite nicely, but the switch that toggles from run, timer and prgm does not ...
I may open my other HP55 to check how different is from an HP67 right switch, but I was wondering if any one knows the difference so that I can avoid to tamper a unit...
Than you very much for all the support !
take care Alberto
Restoring an HP-55, advice appreciated !
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