compaq evo n115 User Manual

2–4Maintenance and Service Guide
Troub leshooting
Flowchart 2.2 - No Power, Part 1
1. Reseat the power cables in the docking 
station and at the AC outlet.
2. Ensure 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?
N Y Y
N
N
Y N
N
Y Y
YN
1. On...

Troub leshooting
Maintenance and Ser vice Guide 2–5
Flowchart 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
Y N
Go to
Section 2.4, No Power, Part 3.
263816m1.book  Page 5  Friday, January 25, 2002  2:14 PM 

2–6Maintenance and Service Guide
Troub leshooting
Flowchart 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? Try different
outlet. Replace external
AC adapter.
Replace
power cord.
Y
N
Y
Y
Y
Y
N
N N
N
External
Internal Go to
Section 2.5, No Power, Part 4.
263816m1.book  Page 6  Friday,...

Troub leshooting
Maintenance and Ser vice Guide 2–7
Flowchart 2.5 - No Power, Part 4
Y
N
Continued from  Section 2.4,
No Power, Part 3.
Reseat loose
components and boards andreplace
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...

2–8Maintenance and Service Guide
Troub leshooting
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 orexternal
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...

Troub leshooting
Maintenance and Ser vice Guide 2–9
Flowchart 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 that notebook is properly 
seated in docking station, for bent  pins on cable, and for monitor  connection. Go to “A” in
Section 2.6,
No Video, Part 1. Check brightness
of external monitor.
Try another external
monitor.
Internal
and external video OK?
Go to...

2–10Maintenance and Service Guide
Troub leshooting
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.
Dockingstation...

Troub leshooting
Maintenance and Ser vice Guide 2–11
Flowchart 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  from 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 troubleshooting, always  check cable connections, cable ends, and 
drives for bent or damaged...

2–12Maintenance and Service Guide
Troub leshooting
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...

Troub leshooting
Maintenance and Ser vice Guide 2–13
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...