compaq evo notebook n800c series User Manual

2–20Maintenance and Service Guide
Troubleshooting
Flowchart 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...

Troubleshooting
Maintenance and Service Guide2–21
Flowchart 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?...

2–22Maintenance and Service Guide
Troubleshooting
Flowchart 2.12—No OS Loading from Hard Drive, Part 3
Y
System
files on hard
drive? Continued from
Section 2.11,
No OS Loading
from Hard Drive,
Part 2.
Clean virus.
Done
N
Install OS
and reboot.
Virus
on hard
drive?OS
loading from
hard drive?
Y
NY
N
Y
N
Diagnostics
on diskette?Replace
hard drive.
Run diagnostics
and follow
recommendations. Run SCANDISK 
and check for
bad sectors.
Can bad
sectors
be fixed?Replace
hard drive.
YN
YN
Fix bad
sectors.Boot from...

Troubleshooting
Maintenance and Service Guide2–23
Flowchart 2.13—No OS Loading from Diskette Drive
Done
Y
N
Reseat
diskette drive. OS not loading
from
diskette drive.
Done
Y
YY Y
Y
Y Y N
N
N NN
NN
OS
loading?
Nonsystem
disk message?Bootable
diskette
in drive?Install bootable
diskette and
reboot computer.
Check diskette
for system files.
Try different
diskette.
1. Replace 
diskette drive.
2. Replace system 
board. Nonsystem
disk error?
OS
loading? Boot
from another
device?
Enable drive
and cold boot...

2–24Maintenance and Service Guide
Troubleshooting
Flowchart 2.14—No OS Loading from CD- or
DVD-ROM Drive
Y
Done
N
Bootable
disc in
drive? Disc
in drive? No OS
Loading from
CD- or
DVD-ROM Drive.Install bootable
disc and
reboot
computer.
Go to
Section 2.17,
Nonfunctioning
Device.
Go to
Section 2.17,
Nonfunctioning
Device. Install
bootable disc.
Boots from
CD or DVD?
Boots from
CD or DVD?Try another
bootable disc.
Booting
from another
device?
Booting
order
correct?
Correct boot
order using
the setup...

Troubleshooting
Maintenance and Service Guide2–25
Flowchart 2.15—No Audio, Part 1
No Audio.
N
Notebook in
docking station
(if applicable)?Internal
audio?
Audio? Done
Undock
Audio? Done Turn up audio
internally or
externally.
Go to
Section 2.16,
No Audio, Part 2.
Go to
Section 2.16,
No Audio, Part 2.
Go to
Section 2.17,
Nonfunctioning
Device.Replace the following docking station 
components one at a time as applicable. 
Check after each change.
1. Reseat docking station audio cable.
2. Replace audio...

2–26Maintenance and Service Guide
Troubleshooting
Flowchart 2.16—No Audio, Part 2
YN
Continued from 
Section 2.15,
No Audio, Part 1.
Reload
audio drivers. Audio
driver in OS
configured?
Audio?
Y Y
Y N N N
Correct
drivers for
application?
Connect to
external
speaker.Load drivers and
set configuration
in OS.
Audio? Done Replace audio
board and
speaker
connections
in notebook 
(if applicable).
1. Replace internal speakers.
2. Replace audio board (if applicable).
3. Replace system board.
268135-002.book...

Troubleshooting
Maintenance and Service Guide2–27
Flowchart 2.17—Nonfunctioning Device
Done
Any physical
device detected?
Y
N
Unplug the nonfunctioning device from 
the notebook, inspect cables and plugs for 
bent or broken pins or other damage.
Reseat 
device.
Clear
CMOS.
DoneFix or
replace
broken item. Nonfunctioning
Device.
Reattach device.
Close notebook,
plug in power,
and reboot.
Device
boots
properly?Go to
Section 2.9,
No OS Loading.
Device
boots
properly? Possible bad
hard drive.
Replace drive....

2–28Maintenance and Service Guide
Troubleshooting
Flowchart 2.18—Nonfunctioning Keyboard
Y
N
OK? Keyboard
not operating 
properly.
External
device
works?Replace
system
board.
Replace
system
board. Connect notebook
to good external 
keyboard.
Reseat internal 
keyboard
connector
(if applicable).
Replace internal
keyboard or
cable.
OK?
Y N
Y
N
DoneDone
268135-002.book  Page 28  Thursday, October 24, 2002  4:10 PM 

Troubleshooting
Maintenance and Service Guide2–29
Flowchart 2.19—Nonfunctioning Pointing Device
Y
N
OK? Pointing device
not operating
properly.
External
device
works?Replace
system
board.
Replace
system
board. Connect notebook
to good external
pointing device.
Reseat internal
pointing device
connector 
(if applicable).
Replace internal
pointing device 
or cable.
OK?
Y N
Y
N
DoneDone
268135-002.book  Page 29  Thursday, October 24, 2002  4:10 PM