Always remove the HDA from the chassis/mainframe before attempting to install,
Table 4-1. Disk Unit Malfunction/Symptom Index
1. Smoke and fire.
2. Noisy HDA operation.
3. Noisy blower fan.
4. PWR ON/PWR OFF switch keeps tripping.
5. PWR RDY indicator not lit.
6. All LEDs won't light.
7. OVER TEMP indicator lit.
8. Slave disk cannot be selected.
9. SEL indicator won't light.
10. RDY indicator won't light.
11. System readiness test won't run.
12. PASS indicator won't light.
13. FAIL indicator won't light.
14. Defective ELAPSED TIME indicator.