Safety Considerations; Hard Failures - HP 9000 Series Service Manual

Safety Considerations

Follow the procedures listed below to ensure safe handling of components and to prevent
harm to both you and the server:
• Use an anti-static wrist strap and a grounding mat, such as those included in the
Electrically Conductive Field Service Kit.
• Handle PCAs and components by the edges only. Do not touch any metal-edge
connectors or any electrical components.
Do not open the system unit until you have turned the system off, removed
CAUTION
the power cord, and removed the LAM or telephone cable from the rear of
the system unit. High energy levels are present inside the system unit
when the power cord is attached. High energy can cause burns or ejection of
molten metal when parts are short-circuited by metal objects such as tools
or jewelry.
Install and deinstall the Power Supply and the LC Display as follows:
1. Shut the system down.
2. Unplug the system.
3. Wait 10 seconds.
4. Proceed To Deinstall/install FRU.

Hard Failures

Hard failures are solid failures. They usually occur during power on, selftest and system
initialization, and they may halt the system. The steps to take when troubleshooting a
hard failure are:
1. Obtain front panel display status. and any system console messages.
2. Find the chassis code in Table 3-5, or Chapters 4, 5, 6, or 7 (Chassis Codes). Note the
cause and follow the steps listed in the action column.
In some cases, failure messages related to the power system are displayed. Refer to the
Power System Troubleshooting section of this chapter for suggestions on troubleshooting
the power system of the computer.
Chapter 3
Troubleshooting
3- 3