Apple IIc Upgraded Motherboards: Diagnostics Error

After an exchange of an upgraded Apple IIc motherboard, running old versions of the Apple IIc diagnostics results in an error condition, most freqently error code number 299.
The older versions of the diagnostics will not work properly with the upgraded motherbords. Use the most current version of Apple IIc diagnostics (at least Rev. C).
Published Date: Feb 19, 2012