compaq evo n610c and evo n600c User Manual

Troubleshooting
Maintenance and Service Guide2–11
Flowchart 2.1 - Initial Troubleshooting
Connecting
to network
or modem?
Begin
troubleshooting.
Is there
power?
Is the OS
loading? Is there video?
(no boot)
Is there
sound?Beeps,
LEDs, or error
messages?
Keyboard/
pointing 
device 
working?Go to
Flowchart 2.17,
Nonfunctioning
Device. Go to
Flowchart 2.2,
No Power, Part 1.
Go to
Flowchart 2.6,
No Video, Part 1.All drives
working?
Y
Y
Y
Y
YY
Y
Y N N
N
N
N
End
N
N
N
Go to
Flowchart 2.9,
No OS Loading.
Go to...

2–12Maintenance and Service Guide
Troubleshooting
Flowchart 2.2 - No Power, Part 1
1. Reseat the power cables in the docking 
station and at the AC outlet.
2. Ensure that the AC power source is active.
3. Ensure that the power strip is working.
Done
Remove from
docking station
(if applicable).
Power up
on battery
power?
Power up
on AC
power?
Power up
in docking
station?
Power up
on battery
power?
Power up
in docking
station?Done *Reset
power.
*Reset
power.Power up
on AC
power?
NY YN
N
YN
N
Y Y
YN
* On...

Troubleshooting
Maintenance and Service Guide2–13
Flowchart 2.3 - No Power, Part 2
Continued from 
Flowchart 2.2,
No Power, Part 1.
Visually check for
debris in battery 
socket and clean 
if necessary.
Done
NY
Power on? Check battery by 
recharging, 
moving it to 
another computer, 
or replacing it.
Power on?
Done
Y
Replace power 
supply (if 
applicable).
N
Power on?
Done
YN
Go to
Flowchart 2.4,
No Power,
Part 3.
279362-001.book  Page 13  Monday, July 8, 2002  11:49 AM 

2–14Maintenance and Service Guide
Troubleshooting
Flowchart 2.4 - No Power, Part 3
Continued from 
Flowchart 2.3,
No Power, Part 2.
Reseat AC adapter
in computer and
at power source.
Internal or
external AC
adapter? Done
Done
Done Done Power on?
Power on?Power on? Plug directly
into AC outlet.
Power LED
on?
Power outlet
active?Try different
outlet.Replace external
AC adapter.
Replace
power cord.
Y
N
Y
Y Y
Y N
NN
N
External
Internal
Go to
Flowchart 2.5,
No Power,
Part 4.
279362-001.book  Page 14  Monday,...

Troubleshooting
Maintenance and Service Guide2–15
Flowchart 2.5 - No Power, Part 4
Y
N
Continued from 
Flowchart 2.4,
No Power, Part 3.
Reseat loose
components and
boards and 
replace
damaged items. Open
computer.
Loose or
damaged
parts?
Y
Close
computer and
retest.
Power on?
Done
N
Replace the following items (if applicable). 
Check computer operation after each 
replacement:
1. Internal DC-DC converter*
2. Internal AC adapter
3. Processor board*
4. System board*
*Replace these items as a set to prevent...

2–16Maintenance and Service Guide
Troubleshooting
Flowchart 2.6 - No Video, Part 1
A
N
Stand-alone
or docking
station? No video.
Replace the following one at a time. Test after each replacement.
1. Cable between notebook and computer display (if applicable)
2. Inverter board (if applicable)
3. Display
4. System board
Internal or
external
display*?Adjust
brightness.Video OK? Done Docking
station
Internal
Stand-alone
External
Adjust
brightness.
Video OK? Done
Y
Press lid
switch to ensure
operation.
Video...

Troubleshooting
Maintenance and Service Guide2–17
Flowchart 2.7 - No Video, Part 2
Y
N
Continued from
Flowchart 2.6,
No Video, Part 1.
Done Video OK?
Adjust external
monitor display. Adjust
display
brightness.
Video OK?Video OK?
Done Done
Check that notebook is properly 
seated in docking station, for bent 
pins on cable, and for monitor 
connection.Go to “A” in
Flowchart 2.6,
No Video, Part 1.Check brightness
of external 
monitor.
Try another
external
monitor.
Internal
and external
video OK?
Go to...

2–18Maintenance and Service Guide
Troubleshooting
Flowchart 2.8 - Nonfunctioning Docking Station 
(if applicable)
Y
N
Reseat power 
cord in docking
station and
power outlet.
N
Replace the following docking station 
components one at a time. Check 
computer operation after each 
replacement.
1. Power supply
2. I/O board
3. Backplane board
4. Switch box
Check voltage 
setting on 
docking station.
Reset monitor 
cable connector at 
docking station.Reinstall 
notebook into 
docking station.
Docking
station...

Troubleshooting
Maintenance and Service Guide2–19
Flowchart 2.9 - No Operating System (OS) Loading
No OS loading
from hard drive,
go to Flowchart 2.10, 
No OS Loading from 
Hard Drive, Part 1.
Reseat power 
cord in docking
station and
power outlet.
No OS
loading.*
* Before beginning troubleshooting, always 
check cable connections, cable ends, and 
drives for bent or damaged pins.
No OS loading
from CD- or
DVD-ROM drive,
go to Flowchart 2.14,
No OS Loading
from CD- or
DVD-ROM Drive.
No OS loading
from...

2–20Maintenance and Service Guide
Troubleshooting
Flowchart 2.10 - No OS Loading from Hard Drive, Part 1
Go to
Flowchart 2.17,
Nonfunctioning
Device.
Y
Done
N
OS not
loading from
hard drive.
Nonsystem
disk message?Go to
Flowchart 2.11,
No OS Loading 
from Hard Drive, 
Part 2.
Reseat
external
hard drive.
OS loading?
Done
Boot
from
CD?
Go to
Flowchart 2.13,
No OS
Loading from
Diskette Drive.
Boot
from
hard drive?
Boot
from
diskette?
Change boot
priority through
the setup utility
and reboot.
Boot
from
hard...