Initial Troubleshooting Procedure - HP 200 Series Hardware Support Document

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Troubleshooting and Diagnostics
Initial Troubleshooting Procedure
The different levels of troubleshooting require different portions of the computer to be functional.
Here is a summary of the functions needed by each procedure:
Procedure
Dei:ld unit
Live unit
Turn-on self-test
What MUST Operate Properly
Nothing
Power supply
Power supply. processor. first 16K RAM. system bus
In order to choose the best approach to start with, obtain as much information as possible from the
user. If the user indicates that the unit is not working at all, the dead unit procedure is a good place
to start. If the user indicates that most of the unit is operating properly, the turn-on self-test may be a
good place to start. If the user's information is not conclusive, use the following procedure to
determine the problem area. The Initial Troubleshooting Flowchart in Figure 8-1 summarizes this
procedure.
1. Turn the computer on and check the power-on LED.
Power-on LED Location
2.
If
the power-on LED lights, skip to step 10.
If
the power-on LED does not light check for
airflow through the fan.
3. If the fan is not running. refer to the Dead Unit Procedure.
4.
If
the fan is running. remove the cover and check fuse F1 on the I/O connectorboard.
If
fuse
F1 is good, skip to step 7.