Can I use the hp45 display for HP55?

[Geoff Quickfall]

Yes.

I used an hp 55 spare led block for transplant to an hp 45 which had a ghosting issue. I then took the 55 quartz crystal and put it in an hp 45 to increase the accuracy of the timing app on the 45.

Hp 80 discussion

Here is a copy from a while ago where I explained the swap.

Re: Heat staked keyboards with sticky, bouncy or corrosion present keyboard PCAs
Message #13 Posted by Geoff Quickfall on 15 Aug 2009, 7:55 p.m.,
in response to message #1 by Geoff Quickfall
Dan,

I agree with the fault being in the LED block!

I have a 45 with a ghost problem and missing decimal point in the middle of the ghosting block.

Swapped with a spare 55 block and the decimal is back and the ghost gone.

Another salvaged 45!

Cheers, Geoff