General Fault Isolation Procedures - Texas Instruments Extensa 660 Series Maintenance Manual

5.4 General Fault Isolation Procedures

Table 5-5 contains a summary of general problems that may occur during operation of
the notebook and the appropriate corrective actions that should be taken for each. For
other symptoms, go on to Paragraph 5.5 and troubleshoot the notebook using
PC-Doctor Diagnostics. In the event of problems using a Port Replicator, try attaching
all desktop devices to the notebook to isolate the problem to either the notebook or the
port replicator. If available, substitute a known good Port Replicator to assist in
troubleshooting.
Problem
No power
Data on the LCD is
unreadable
5-12 Troubleshooting Procedures
Table 5-5 General Troubleshooting Procedures
1. Check that the AC adapter is plugged into the
power connector of the system. Also, check that
the AC adapter is plugged into a properly
grounded AC power outlet.
2. If using the battery as main power source, check
if the battery pack is of the right type, charged,
and is inserted correctly.
3. Check the powerboard of the system. Is it inserted
into the motherboard connector properly.
Otherwise, replace the powerboard.
1. Adjust the brightness and contrast display
controls.
2. Check if the LCD cables are inserted properly.
Check also connections inside the LCD panel.
3. Check if installed VGA driver is correct.
4. Check VGA controller chip on the motherboard to
see if there is any cold or loose soldering.
5. Replace the motherboard.
Corrective Actions