Dell Inspiron Lm Service Guide

System Overview 1-11
Dual-Scan Display (Continued)
Dot pitch . . . . . . . . . . . . . . . . .  0.29 mm
Power consumption. . . . . . . . .  3.4 W 
Controls . . . . . . . . . . . . . . . . . .  brightness and contrast can be controlled 
through key combinations
Keyboard
Number of keys . . . . . . . . . . . .  87 (U.S. and Canada); 88 (Europe); 89 (Japan)
Key travel  . . . . . . . . . . . . . . . .  3.0 ± 0.5 mm (0.12 ± 0.02 inch)
Key spacing. . . . . . . . . . . . . . .  19.1 mm (0.75 inch)
Layout . . . ....

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Main Battery
Type  . . . . . . . . . . . . . . . . . . . .  lithium ion
Dimensions:
Height . . . . . . . . . . . . . . . .  22.0 mm (0.86 inch) 
Depth  . . . . . . . . . . . . . . . .  219.0 mm (8.62 inches)
Width  . . . . . . . . . . . . . . . .  57.8 mm (2.27 inches)
Weight. . . . . . . . . . . . . . . . . . .  0.44 kg (0.97 lb)
Voltage  . . . . . . . . . . . . . . . . . .  10.8 VDC
Capacity  . . . . . . . . . . . . . . . . .  42 WH
Charge time...

System Overview 1-13
AC Adapter
Input voltage . . . . . . . . . . . . . .  90 to 264 VAC 
Input current (maximum)  . . . .  1.0 A at 100 VAC, full load
Input frequency . . . . . . . . . . . .  47 to 63 Hz
Output current . . . . . . . . . . . . .  2.6 A (continuous)
Output power  . . . . . . . . . . . . .  34 W
Rated output voltage . . . . . . . .  16.2 VDC
Physical:
Height . . . . . . . . . . . . . . . .  27.0 mm (1.06 inches)
Width. . . . . . . . . . . . . . . . .  60.0 mm (2.36 inches)
Depth. . . . . ....

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Environmental (Computer)
Temperature:
Operating  . . . . . . . . . . . . .  5° to 35°C (41° to 95°F)
Storage  . . . . . . . . . . . . . . .  -20° to 50°C (-4° to 122°F)
Relative humidity . . . . . . . . . .  10% to 90% (noncondensing)
Maximum vibration:
Operating  . . . . . . . . . . . . .  0.51 GRMS using a random-vibration spectrum 
that simulates air shipment
Storage  . . . . . . . . . . . . . . .  1.1 GRMS using a random-vibration spectrum 
that simulates...

Initial Procedures 2-1
Chapter 2
Initial Procedures
T
his chapter describes initial procedures that can help you diagnose a com-
puter problem. These procedures can often reveal the source of a problem or 
indicate the correct starting point for troubleshooting the computer. Dell recom-
mends that you perform these initial procedures in the order they are presented.
Initial User Contact
When you first contact a user who has a problem, ask the user to describe the 
problem and the conditions under which...

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components, as instructed in the following procedure, see Chapter 4, “Remov-
ing and Replacing Parts.” 
To perform a visual inspection, follow these steps:
1. Determine the power state of the computer.
If the display is on, go to step 2.
If the display is off, press any key to verify that the computer is not in sus-
pend or standby mode. Then proceed to step 2.
2. Turn off any attached peripherals, and then turn off the computer. 
Then proceed to step 3.
3....

Initial Procedures 2-3
12. If an external monitor is connected, verify the following: 
a. The monitor’s interface cable is properly attached to the external-
monitor connector on the computer’s I/O panel.
b. The monitor’s power cable is attached to a power source and is free of 
any obvious physical damage.
c. The monitor and its interface cable are free of any obvious physical 
damage.
d. The monitor’s controls are set according to the instructions in the docu-
mentation for the monitor.
13. If an...

2-4 Dell Latitude LM Systems Service Manual
3. Watch the indicators at the top of the keyboard. Depending on how 
your computer is configured, after various indicators flash momen-
tarily in the status display panel, some indicators should light up and 
remain on.
Do these indicators light up within seconds after the boot routine starts?
Ye s .  Proceed to step 4.
No.  Troubleshoot the power subsystem.
4. While the boot routine is running, observe the computer for any of the 
following:
•Diskette-drive...

Initial Procedures 2-5
Eliminating Resource Conflicts
Devices within or connected to the computer may require dedicated memory 
spaces, interrupt levels, and/or DMA channels. Because different devices can be 
configured at different times, it is possible the same resource is assigned to two 
or more devices.
Disconnect all peripherals and remove all PC Cards to make sure that the com-
puter failure is not caused by faulty devices.
If you suspect that resource conflicts might exist, check the computer and...

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