From an article by Betty Clay, The Transactor, March 1988
On pre-Workbench 3.0 machines, the Amiga flashed screen colors as it booted:
||Initial hardware tested OK.
||Software is OK
||Initialization tests passed.
If something goes wrong with your Amiga, you might see these colors:
|Error in ROM
||Error in Chip RAM
||Error in custom chips
||The CPU found an error before error trapping software (the guru) was running
Finally, the keyboard performs a self-test. The number of times the CAPS LOCK light flashes tells you what is wrong:
|Keyboard ROM check failed
||Keyboard RAM check failed
||Watchdog timer test failed
||Short exists between two row lines or one of the seven special function keys