Dell Precision M40 User Manual page 68

7. Turn off the computer, wait a few seconds, and then turn on the computer again. Does the
8. Does the computer boot successfully?
9. Remove and reinstall any batteries, and check the AC adapter connection. Does the
No Power, Using AC Basic Checks:
Adapter
l
l
l
Fill out the
1. Turn off the computer and devices and disconnect them from the electrical outlet. If you are using a surge
2. Make sure the
3. Does the light on top of the AC adapter light up?
4. Turn on the computer. Does the
5.
No Power, Using Fill out the
Battery
1. Turn off the computer and devices. Disconnect the devices from the electrical outlet.
If an AC adapter is not 2.
connected to your
3. Press the power button. Does the computer turn on?
computer, the computer runs
on battery power. If the
computer does not turn on
when a battery is installed,
the battery's charge may be
depleted.
4. Use the AC adapter to
5. Does the
6. Press the power button. Does computer turn on?
Yes. Your computer is receiving power. Go to step 8.
No. Your computer is not receiving power. Go to step 9.
Yes. The problem is resolved.
No. Go to step 9.
Yes. The problem is resolved.
No. If the computer is powered by the AC adapter, see
using battery power, see "No Power, Using
Test the electrical outlet: Ensure that the electrical outlet is working by testing it with another device such as a
lamp.
Connect the AC adapter directly to an electrical outlet: Bypass power protection devices, power strips, and
extension cords to verify that the computer turns on.
Check for interference: High-voltage electrical appliances on the same circuit or operating in close proximity to
the computer can cause interference. Extension cords or too many devices on a power strip or multiple power
strips connected to an electrical outlet can cause problems.
Diagnostics Checklist as you perform the following steps:
protector, remove it.
AC adapter is connected to the computer, and then verify that the power cable is firmly attached
to the AC adapter and to the electrical outlet.
Yes. Go to step 4.
No. The AC adapter may be defective. Go to step 5.
Yes. The problem is resolved.
No. Go to step 5.
Call Dell for technical assistance.
Diagnostics Checklist as you perform the following steps:
Remove and then reinstall each
Allow 1 minute for the computer to initialize its components before checking for signs of power.
Yes. The battery was not seated properly. The problem is resolved.
No. Use the AC adapter to connect your computer to an electrical outlet. If the computer operates normally
when using AC power, go to step 4. If the computer does not boot when using the AC adapter, see
Power, Using AC Adapter."
charge the
light remain constantly lit (not blinking), indicating that the battery is charging?
Yes. Go to step 6.
No. You may have a defective battery.
Yes. You needed to charge the battery. The problem is resolved.
"No Power, Using AC
Battery."
light appear?
battery in its bay.
battery.
Call Dell for technical assistance.
light appear?
light appear?
Adapter." If the computer is
"No