Both display and keyboard seem to work fine. I really cannot test beyond this for lack of knowledge about the device. Computer is in decent physical condition but does show yellowing from age.
I have seen much worse. However at this time, the computer functions as described!Please check out my other listings. The item "Vintage HP 83 (83A) Powers on and displays" is in sale since Thursday, March 26, 2020.
This item is in the category "Computers/Tablets & Networking\Vintage Computing\Vintage Computers & Mainframes". The seller is "scifi-man" and is located in Middleton, Nova Scotia. This item can be shipped worldwide.