LisaFAQ | sunder.net |
| Tones | Meaning |
| lo | CPU board or Memory error |
| lo, lo | Memory failure (no usable memory) |
| lo, hi | Card Cage error (general logic failure) |
| lo, lo, hi | CPU board error |
| lo, hi, lo | I/O board error |
| lo, hi, hi | Memory error |
| hi, lo, lo | Expansion slot error |
| hi, lo, hi | Keyboard error |
| hi, hi, lo | Keyboard/mouse disconnected |
| hi, hi, hi | Startup device invalid/failure |
| click | Basic test passed |
| click, click | Self-test completed |
| hi | Keypress ignored |
The triple tones are typically displayed with an icon that indicates the source of the problem, but of course, in the case of some CPU, memory, or I/O board errors, the display will be either dark, random, or flashing.
Source: Lisa ROM, Lisa User's Guide
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