9815A - New in Open Box - What to do to NOT damage it.

[jeejohn]

I have a HP-9815A that is essentially new in open box, with no extra accessories. I bought it about 25 years ago from a dealer who wanted to get rid of it. As far as I remember, I have had it out of the box twice back when I first bought it and a few years later. I know everything worked the first time. I think at that time I programmed it to run the Savage benchmark. The second time, the printer feed was no longer working. I have never tried the tape drive.

Now I have pulled it out of storage to look it over for a third time. I have not plugged it in, as who knows what would happen to it now after some 25 years of storage, particularly with the power transformer being internal to the machine.

What are your suggestions with how I should proceed with this?

My intent is to eventually sell it.