HP 28C diagnostic check

[Tim Drotar]

How do you perform a diagnostic check on a 28C. I lost my manuals but I seem to recall is you push a combo of buttons, the calculator wil perform a diagnostic check. Thanks for your help.

[Dave Hicks]

Take a look at the bottom of:

http://www.hpmuseum.org/features/28cf.htm

[Tim Drotar]

THANKS!!!!!!!