compaq notebook evo n160 series User Manual

							2–4Maintenance and Service Guide
Troubleshooting
2.2 No Power, Part 1
No Power
(Power LED is off)
1. Reseat power cables in docking station
and at the AC outlet.
2. Ensure the AC power source is active.
3. Ensure 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
1. On some models, there is a separate res
button.
2. On some models, the computer may be
reset using the Standby switch and eithe
the lid switch or the main power switch. *Notes:Go to
Section 2.4,
No Power,
Part 3.Go to
Section 2.3,
No Power,
Part 2.
Go to
Section 2.8,
Nonfunctioning
Docking Station. 
						

							Troubleshooting
Maintenance and Service Guide2–5
2.3 No Power, Part 2
Continued from
Section 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
Section 2.4,
No Power,
Part 3. 
						

							2–6Maintenance and Service Guide
Troubleshooting
2.4 No Power, Part 3
Continued from
Section 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?Tr y d i f f e r e n t
outlet.Replace external
AC adapter.
Replace
power cord.
Y
N
Y
Y Y
Y N
NN
N
External
Internal
Go to
Section 2.5,
No Power,
Part 4. 
						

							Troubleshooting
Maintenance and Service Guide2–7
2.5 No Power, Part 4
Y
N
Continued from
Section 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
shorting out among components. 
						

							2–8Maintenance and Service Guide
Troubleshooting
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
Standalone
External
Adjust
brightness.
Video OK? Done
Y
Depress lid
switch to ensure
operation.
Video OK? Done
Y
N
Video OK?
DoneDone
N
Check for bent
pins on cable.
Tr y
another
display.Internal and
external
video OK?Replace
system
board.
YYN N
*Note:To change from internal to
external display, use the hotkey
combination.
Y
Go to
Section 2.7,
No Video, Part 2. 
						

							Troubleshooting
Maintenance and Service Guide2–9
2.7 No Video, Part 2
Y
N
Continued from
Section 2.6,
No Video, Part 1.
Done Video OK?
Adjust external
monitor display.Adjust
display
brightness.
Video OK?Video OK?
Done Done
Check for notebook properly
seated in docking station, bent
pins on cable, and for monitor
connection.Go to “A” in
Section 2.6,
No Video, Part 1.Check brightness
of external
monitor.
Tr y a n o t h e r
external
monitor.
Internal
and external
video OK?
Go to Section 2.8,
Nonfunctioning
Docking Station.
YY
Y N
N
N
Remove
notebook from
docking station,
if connected. 
						

							2–10Maintenance and Service Guide
Troubleshooting
2.8 Nonfunctioning Docking Station
(if applicable)
Y
N
Reseat power
cord in docking
station and
power outlet.
N
Replace these 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
5. Docking motor mechanism
Check voltage
setting on
docking station.
Reset monitor
cable connector at
docking station.Reinstall
notebook into
docking station.
Docking
station
operating?
Docking
station
operating?
Remove
notebook, reseat
all internal parts,
and replace any
damaged items in
docking station.DoneDone
Y
Nonfunctioning
docking station 
						

							Troubleshooting
Maintenance and Service Guide2–11
2.9 No Operating System (OS) Loading
No OS loading
from hard drive,
go to
Section 2.10.
Reseat power
cord in docking
station and
power outlet.
No OS loading
form diskette
drive, go to
Section 2.13.
No OS loading
from CD- or
DVD-ROM drive,
go to
Section 2.14.
No OS loading
from network,
go to
Section 2.20.
No OS
loading*
*Before beginning, always check cable
connections, cable ends, and drives for bent
or damaged pins. 
						

							2–12Maintenance and Service Guide
Troubleshooting
2.10 No OS Loading from Hard Drive, Part 1
Go to
Section 2.17,
Nonfunctioning
Device.
Y
Done
N
OS not
loading from
hard drive.
Nonsystem
disk message?Go to
Section 2.11,
No OS Loading
from Hard Drive,
Part 2.
Reseat
external
hard drive.
OS loading?
Done
Boot
from
CD?
Go to
Section 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 drive?
Y Y
Y YY
N N
N N N
Check the setup
utility for correct
booting order. 
						

							Troubleshooting
Maintenance and Service Guide2–13
2.11 No OS Loading from Hard Drive, Part 2
Continued from
Section 2.10,
No OS Loading
from Hard Drive,
Part 1.
Reseat
hard drive.
Done CD or
diskette in
drive?1. Replace hard
drive.
2. Replace system
board.
Go to
Section 2.13,
No OS Loading
from Diskette
Drive.
Load OS using
Restore CD if
applicable. Format hard drive
and bring to a
bootable C:\
prompt.Create partition,
then format hard
drive to bootable
C:\ prompt.
Boot
from diskette
drive? Remove
diskette and
reboot.
YN
Boot
from
hard drive?
Y
N
YN
Hard drive
accessible?
YN
Hard drive
accessible?Done
Run FDISK.
Y
N
Hard drive
partitioned?
Hard drive
formatted?
YN
YN
Computer
booted?
Done
Y
N
Go to
Section 2.12,
No OS Loading
from Hard Drive,
Part 3.Go to
Section 2.12,
No OS Loading
from Hard Drive,
Part 3.