Re: "OFF g ENTER ON" on 12c platinums Message #4 Posted by Katie Wasserman on 2 June 2010, 11:52 a.m., in response to message #3 by Martin Pinckney
Pressing (1) does an LCD test. It lights up all segments then allows you to press Rv to light up half of the segments, then Rv again to see the other half.
Pressing (2) computes a ROM the checksum, then press ENTER to see the version number, then ENTER again to see the copyright message.
Pressing (3) starts a keyborad test. You then need to press every key at least once in any order to complete the test. Each key press will turn off 1 to 4 (I think) segments on the display.
Pressing (4) seems to do a CPU check of some sort. (The 12C+ doesn't have this test.)
-Katie
|