| Problem | Possible Causes | Remedies |
| Keyboard does not respond at all or prints wrong characters | Bad or loose cable | Re-connect cable |
| Bad circuitry | Call engineer | |
| One or more keys do not work | Bad key or chip | Call engineer and get key or chip replaced |
| Keyboard allows you to enter either upper-case or lower-case characters only | The Shift or Caps Lock key may be stuck | Loosen key |
| Bad Shift or Caps Lock key | Call engineer and get key replaced |
Troubleshooting the Keyboard