Dell Latitude LM - Manual (Page 47)

Troubleshooting Your Computer 3-13
Total Power Failure When Using the AC
Adapter
If no signs of power are present in the computer when
using the AC adapter, make a copy of the Diagnostics
Checklist found in Chapter 5 and fill it out as you com-
plete the following procedure:
1. Turn off the computer and peripherals, and dis-
connect them from AC power. If you are using a
surge protector, remove it.
2. Make sure the AC adapter is connected to the
computer, and verify that the power cable is
firmly attached to the AC adapter and to the AC
power source.
See “Checking Connections” found earlier in this
chapter.
3. Does the light-emitting diode (LED) on top of the
AC adapter turn on?
Yes. Go to step 4.
No. The AC adapter may be defective. Go to step 5.
4. Turn on the computer. Does the power indicator
appear in the status display panel?
Yes. The problem is resolved.
No. Go to step 5.
5. Call Dell for technical assistance.
See Chapter 5, “Getting Help,” for instructions.
Total Power Failure When Using a Battery
If an AC adapter is not connected to your computer, the
computer’s power source is its battery. If the battery sta-
tus indicator does not appear in the status display panel
when you turn on the computer, the battery’s charge may
be depleted. If the battery status indicator is empty, the
battery may be nearly out of charge or defective. To
troubleshoot this problem, make a copy of the Diagnos-
tics Checklist found in Chapter 5 and fill it out as you
complete the following procedure:
1. Turn off the computer and peripherals. Dis-
connect the peripherals from AC power.
2. Reseat (remove and reinstall) each installed bat-
tery by first removing and then replacing the
battery in its compartment.
3. Turn on the computer. Does the battery status
indicator appear in the status display panel?
Allow one minute for the computer to initialize its
components before checking for signs of power.
Yes. Go to step 4.
No. Use the AC adapter to connect your computer to AC
power. If the computer operates normally when using AC
power, go to step 7. If the computer does not boot when
using the AC adapter, see the previous subsection,
“Total Power Failure When Using the AC Adapter.”
4. Is the battery status indicator blinking?
Yes. Go to step 7.
No. Go to step 5.
5. Is a battery status indicator solid, and does the
AC power indicator appear in the status display
panel?
Yes. Go to step 6.
No. The battery is defective. Call Dell for technical
assistance. (See Chapter 5, “Getting Help,” for
instructions.)
6. Is there a single bar on the far left of the battery
status indicator?
Yes. The battery is too hot. Remove the battery, and
let it cool to room temperature. Then reinstall the
battery, reboot the computer, and go back to step 3.
(If you return to step 6 the second time you perform
this procedure, call Dell for technical assistance [see
Chapter 5, “Getting Help,” for instructions].)
No. Call Dell for technical assistance. (See Chapter
5, “Getting Help,” for instructions.)
7. Use the AC adapter to fully charge the battery.
For instructions, see the topic titled “Charging the
Battery” in the online System User’s Guide. The bat-
tery charges in 3 hours using an AC power source if
the computer is off; the battery charges in 4 hours if
the computer is on.