read the manual.
why not learn to use google, and search for your service manual
hint, its not at HP support ended what 7years ago.
its 16 years old now. why fool with something this old.?
if it works leave it be... no parts now. from HP, only used parts.
many used part are bad.
leaving one thing, google search,
The HP books exit on the web, (not HP)
here is a close match, btw, first google hit,, shock !