Acer Extensa 660 Maintenance Manual

                                                                                           Troubleshooting Procedures    5-11  
5.3.4 Run Time Error Messages
In the event of a hardware/software error that occurs after completion of POST, the 
error messages listed and described in Table 5-4 may occur.
Table 5-4  Run Time Error Message Troubleshooting
5.3.5 PCMCIA Modem Problems
If an optional PCMCIA modem does not work properly, check the following items:
¨Dialing problem or wrong number - Try dialing a...

5-12   Troubleshooting Procedures
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...

                                                                                           Troubleshooting Procedures    5-13  
Table 5-5  General Troubleshooting Procedures (continued)
LCD screen does not
show data1.  Check the LCD Status Bar if Suspend mode is
activated.  Press any key or press the power
button to resume operation and display.
2.  Check if LCD cables are disconnected or loose.
3.  Check if the display output is switched to the
external monitor.
4.  Check if the Contrast level is set to...

5-14   Troubleshooting Procedures
Table 5-5  General Troubleshooting Procedures (continued)
M em o ry  m alfu n ctio n 1 .  C h eck  if th e m em o ry  m o d u le is in serted
properly.
2.  Replace the memory module.
3. Replace the m otherboard.
External keyboard or PS/2
mouse doesn’t work1.  C heck if the keyboard or the m ouse are
connected properly. C heck if the Y-cable is
bein g  u sed . P ow er off sy stem  first before
plugging in the device.
2.  Replace the keyboard or m ouse.
3. Replace the m...

                                                                                           Troubleshooting Procedures    5-15  
5.5 Fault Isolation Using Diagnostics
PC-Doctor, supplied with the Extensa Series Notebooks, is a powerful diagnostics tool 
that can help you determine the hardware configuration of a local or remote system, 
benchmark its performance, analyze the performance of all subsystems, and perform 
a suite of interactive and non-interactive tests on attached devices (such as printers,...

5-16   Troubleshooting Procedures
¨Group of special purpose utilities to run other tests from PC-Doctor, perform a 
virus scan of the system, edit configuration files, surface scan hard drives, 
measure system performance, open a DOS prompt, provides terminal access 
to devices connected to serial ports, supports memory debug operations, 
enables remote operations, permits deep discharge of notebook batteries and 
provides an extensive test reporting function.
5.5.2 Supporting Online Documentation
The...

                                                                                           Troubleshooting Procedures    5-17  
5.5.4  Quitting PC-Doctor
To exit PC-Doctor, select the Quit pull down menu and then select the Quit option.
Note: For additional information, access the Online Reference Manual for 
PC-Doctor.
5.6 Board Level Troubleshooting Procedures
Figures 5-2 through 5-19 contain board-level troubleshooting procedures for the 
Extensa 660 Notebook. Table 5-6 contains a diagram index to the...

5-18   Troubleshooting Procedures
Figure 5-2  System Fails to Boot, Initial Checks
1
Vcc5=5V
Vcc3=3.3VCheck CON10 Pin13
PWRON=5V
Check DC-DC
Converter
Check PWRGOODCheck U7 P1C16C62
Pin23 PWRGOOD
Yes
No
Yes
No
Check CPUCLK=66MHzCheck U39 74CT2524
Pin2
Check PCICLK=33MHzCheck U40 74CT2524
Pin6
END
Yes
Yes
No
No
System Fails to Boot:
Initial Tests 

                                                                                           Troubleshooting Procedures    5-19  
Figure 5-3  Memory Interface Troubleshooting Diagram
2
Check MEMVCC=3.3VCheck CN10 Pin 10
Check RAS0, CAS(0~7)
SignalsCheck RP45, RP86,
RP87
Check MAC(0~11)Check RP39, RP47,
RP51
Check MD(0~63)
Check U12, U15, U22,
U27, U28, U31, U32, &
U33 Pin 2, 3, 4, 5, 7, 8,
9, 10, 41, 42, 43, 44, 46,
47, 48, & 49
END
Yes
No
Yes
Yes
Yes
No
No
No
Memory Interface TestsSystem Fails to Boot: 

5-20   Troubleshooting Procedures
Figure 5-4  CRT Interface Troubleshooting Diagram
Check CN4 and CRT
CableCheck L15, L21, L22,
L23, L24 (Red, Green,
Blue, Hsync, Vsync)
Check VGA Clock,
14,318MHz and
32,768KHzCheck U20 (2093)
Pin 71=33MHz,
Pin 93=14,318MHz,
Pin 82=32,768KHz
END
Yes
No
Yes
No
3
System Fails to Boot:
CRT Interface Checks