I've got two (yes 2) HP27s. The first I've had since college (1987), the "5" key only works some of the time, but I've gotten used to it. I purchased another 27S about a year ago on Ebay, and it was in great shape and worked like it was new. The other week, I went to turn it on, and it wouldn't power up. I put new batteries in it, and it still wouldn't come up. I was looking on the web tonight, and found a combination of keys, when pressed, resets the machine. I did this, and it powered up, but what I found through this is the CLR (ON/OFF) key is broken. Does anyone know how to open up the 27S to fix a key? Can this be done successfully?

Any info would be greatly appreciated. I've already started my search for another 27S (or I may just have to settle (Very Depressing) for a 17BII). I think we need to start a petition for HP to bring back the 27S.



I'd suggesting reading Paul Brogger's Pioneer repairs article in the repairs section.


It's not easy but it can be done.


Hi Tim:

Petition for a 27-S revival is a great idea; I do not believe they would listen anayway. Look at the HP calculator range 2000 vs 1985 or 1990



to a preorder, then we might be able to get HP's attention.

I'm not sure what the exact number is but from past experience, I can tell you that 500 isn't nearly enough.


Great - I start with 3 units. Is there anybody who could coordinate?



With respect to the HP42S, they are not actually manufactured by HP, but it is given out on contract to another company to build/assemble. The last set was manufactured in June this year. I spoke to the guy at HP who is in charge of placing the orders for the 42S calculators and he says it has reached the End of Line.

I am aware that there are still parts available to build the 42S, but HP is adamant that they would not continue to build the 42S because it has stopped, even though there are still parts available.

So to be honest I don't believe any quantity of HP27S would sway HP. I think when a calculator has been discontinued it takes a lot of red tape to bring it back into production. The 42S although it was discontined, it was still manufactured in small quantities if only to service 'dead' ones.
Also, the 42S was produced on the HP17BII production line. Stopping the line for a few days or even few weeks and making a batch of 42Ss is not a big deal.

But now that it has reached EOL it's history.
It's that simple, although hard to accept and understand.

But then anything is worth a try at least once I say.

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