Hardware Maintenance Manual
Page 8
... safety Observe the following rules when working on electrical equipment; If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine, and to lock the wall box in the off position. • If you can cause ...your pocket or behind your work with the reflective surface of mat to listed above rule, you from a circuit. Power supply units - Some hand tools have , near power supplies - Observe the special safety precautions when you when working with live electrical circuits with very high voltages; Performing a mechanical...
... safety Observe the following rules when working on electrical equipment; If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine, and to lock the wall box in the off position. • If you can cause ...your pocket or behind your work with the reflective surface of mat to listed above rule, you from a circuit. Power supply units - Some hand tools have , near power supplies - Observe the special safety precautions when you when working with live electrical circuits with very high voltages; Performing a mechanical...
Hardware Maintenance Manual
Page 9
... could be frayed or worn. 4. Check for any obvious non-Lenovo alterations. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with the power off, and the power cord disconnected. Use a meter to get medical aid. b. The power cord should use the following checklist at the same charge. Handling...
... could be frayed or worn. 4. Check for any obvious non-Lenovo alterations. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with the power off, and the power cord disconnected. Use a meter to get medical aid. b. The power cord should use the following checklist at the same charge. Handling...
Hardware Maintenance Manual
Page 36
...to excessive force, or dropped. Power system checkout To verify a symptom, do the following : • Replace the system board. • If the problem persists, go to Chapter 5 "Lenovo B590" on page 37. 30 Hardware Maintenance Manual If the voltage is supplied when you are here because ...the computer fails only when the ac power adapter is acceptable, do the following : 1. • Diskette drive damage ...
...to excessive force, or dropped. Power system checkout To verify a symptom, do the following : • Replace the system board. • If the problem persists, go to Chapter 5 "Lenovo B590" on page 37. 30 Hardware Maintenance Manual If the voltage is supplied when you are here because ...the computer fails only when the ac power adapter is acceptable, do the following : 1. • Diskette drive damage ...