IBM B50 - Manual (Page 29)

Changes have been made to the equipment that may affect the safe operation of
the equipment.
External devices with separate power supplies have been attached.
If the inspection indicates an unacceptable safety condition, the condition must be
corrected before anyone can service the machine.
Note: The owner of the server is responsible to correct any unsafe conditions.
Perform the following checks:
1. Check the covers for sharp edges and for damage or alterations that expose the
internal parts of the server.
2. Check the covers for proper fit to the server. They should be in place and
secure.
3. Gently rock the server from side to side to determine if it is steady.
4. Set the power switch of the server to Off.
5. Disconnect the power cable.
6. Remove the covers.
7. Check for alterations or attachments. If there are any, check for obvious safety
hazards, such as broken wires, sharp edges, or broken insulation.
8. Check the internal cables for damage.
9. Check for dirt, water, and any other contamination within the server.
10. Check the external power cable for damage.
11. With the external power cable connected to the server, check for 0.1 ohm or less
resistance between the ground lug on the external power cable plug and the
metal frame.
12. Perform the following checks on each device that has its own power cables:
a. Check for damage to the power cord.
b. Check for the correct grounded power cable.
c. With the external power cable connected to the device, check for 0.1 ohm or
less resistance between the ground lug on the external power cable plug and
the metal frame of the device.
13. Install the covers.
Chapter 1. Reference Information 1-11