compaq notebook evo n150 series User Manual

							1–16Maintenance and Service Guide
Product Description
The external components on the bottom of the computer are
shown in Figure 1-6 and described in Table 1-6.
Figure 1-6. Bottom Components
Ta b l e 1 - 6
Bottom Components
Component Function
1 Media Bay release latch Releases the Media Bay device
from the connector.
2 Serial number Identifies the computer; needed
when you call Compaq customer
support. 
						

							Product Description
Maintenance and Service Guide1–17
3 Reset button Manually resets the system if a
failure occurs.
ÅWARNING:Resetting the
computer will cause
unsaved information to be
lost. Before performing a
reset, close all
applications and shut
down Windows, if
possible.
4 Fan Provides airflow to cool internal
components.
5 Memory expansion
compartment coverCovers the memory expansion
compartment that contains two
memory expansion slots for
memory expansion boards.
6 Hard drive Removable primar y hard drive.
Two screws secure the hard drive
to the computer.
7 Battery security latch Secures the battery pack in the
battery compartment.
8 Battery release latch Releases the battery pack from
the battery compartment.
9 Battery compartment Holds the primary battery pack.
10 Media Bay Accepts a diskette drive, CD- or
DVD-ROMdrive,orsecondary
battery pack.
Ta b l e 1 - 6
Bottom Components(Continued)
Component Function 
						

							1–18Maintenance and Service Guide
Product Description
1.4 Design Overview
This section presents a design overview of key parts and features
of the computer. Refer to Chapter 3, “Illustrated Parts Catalog,” to
identify replacement parts, and Chapter 5, “Removal and
Replacement Procedures,” for disassembly steps. The system
board provides the following device connections:

Memory expansion board

Hard drive

Display

Keyboard/TouchPad or pointing stick

Audio

Intel Pentium III or Celeron processors

Fan

PC Card

Modem or modem/NIC
The computer uses an electrical fan for ventilation. The fan is
controlled by a temperature sensor and is designed to turn on
automatically when high temperature conditions exist. These
conditions are affected by high external temperatures, system
power consumption, power management/battery conservation
configurations, battery fast charging, and software applications.
Exhaust air is displaced through the ventilation grill located on
the right side of the computer.
Ä
CAUTION:To properly ventilate the computer, allow at least a 3-inch
(7.6-cm) clearance on the left and right sides of the computer. 
						

							Maintenance and Service Guide2–1
2
Troubleshooting
ÅWARNING:Only authorized technicians trained by Compaq should
repair this equipment. All troubleshooting and repair procedures
are detailed to allow only subassembly/module level repair.
Because of the complexity of the individual boards and
subassemblies, no one should attempt to make repairs at the
component level or to make modifications to any printed wiring
board. Improper repairs can create a safety hazard. Any indication
of component replacement or printed wiring board modification may
void any warranty or exchange allowances.
Utilities that are preinstalled on the computer include:

PhoenixBIOS Setup Utility—Allows you to modify or
restore factory default settings and configure the system
BIOS to diagnose and solve minor problems.

Power Management—Allows you to reduce your computer
power consumption. Power Management information is
contained in Chapter 1.

Security—Allows you to set or remove your power-on
password. 
						

							2–2Maintenance and Service Guide
Troubleshooting
Using the PhoenixBIOS Setup Utility
The PhoenixBIOS Setup Utility (PSU) is built into the system.
You can configure the system BIOS and modify or restore factory
default settings, such as date and time, types of disk drives, power
management, and password settings. To run PSU, press
F10
during system startup. When the main screen displays, use the
keyboard and arrow keys to move around the menus and make
selections. 
						

							Troubleshooting
Maintenance and Service Guide2–3
Troubleshooting Flowcharts
Ta b l e 2 - 1
Troubleshooting Flowcharts Overview
Section Description
2.1 Initial troubleshooting
2.2 No power, part 1
2.3 No power, part 2
2.4 No power, part 3
2.5 No power, part 4
2.6 No video, part 1
2.7 No video, part 2
2.8 Non functioning docking station
2.9 No operating system (OS) loading
2.10 No OS loading from hard drive, part 1
2.11 No OS loading from hard drive, part 2
2.12 No OS loading from hard drive, part 3
2.13 No OS loading from diskette drive
2.14 No OS loading from CD- or DVD-ROM drive
2.15 No audio, part 1
2.16 No audio, part 2
2.17 Non functioning device
2.18 Non functioning keyboard
2.19 Non functioning pointing device
2.20 No network or modem connection 
						

							2–4Maintenance and Service Guide
Troubleshooting
2.1 Initial Troubleshooting
Connecting
to network
or modem?Go to
Section 2.20,
No Network
or Modem
Connection.
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
Section 2.17,
Non Functioning
Device Go to
Section 2.2,
No Power
Go to
Section 2.6,
No VideoAll drives
working?
Y
Y
Y
Y
YY
Y
Y N N
N
N
N
End
N
N
N
Go to
Section 2.9,
No OS Loading
Go to
Section 2.15,
No AudioGo to
Section 2.18,
Non Functioning
Keyboard,
or Section 2.19,
Non Functioning
Pointing Device. Check
LED board,
speaker
connections. 
						

							Troubleshooting
Maintenance and Service Guide2–5
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 AC power source is active.
3. Ensure 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
*Notes:
1. On some models, there is a separate
reset button.
2. On some models, the computer may
be reset using the Standby switch
andeitherthelidswitchorthemain
power switch.Go to
Section 2.4,
No Power, Part 3Go to
Section 2.3,
No Power, Part 2
Go to
Section 2.8,
Non Functioning
Docking Station 
						

							2–6Maintenance and Service Guide
Troubleshooting
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 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 
						

							Troubleshooting
Maintenance and Service Guide2–7
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