Testing the AC Adapter: If the Power-On
indicator is not on, check the power cord of the AC adapter
for proper installation and continuity.
1. If any noise can be heard from the AC adapter when
it is plugged into line voltage, replace the AC adapter
with a new one.
If no noise can be heard from the adapter, go to Step
3.
2. If the noise still comes from the new AC adapter,
suspect the computer. Replace the AC adapter with
the original one, then go to the next step. If no noise
comes from the new adapter, the original adapter has
the problem.
3. Unplug the AC adapter cable from the computer and
measure the output voltage at the plug of the AC
adapter cable.
1
2
If the voltage is not correct:
1. Unplug the AC adapter from the ac power outlet
and leave it for a few minutes.
2. Plug the AC adapter into the ac outlet.
3. Measure the output voltage of the AC adapter.
4. If the voltage is still not correct, replace the AC
adapter.
If the voltage is OK, plug the cable into the computer
and try the failing operation again.
If the problem still remains, replace the voltage converter.
If the problem disappeared, suspect the installation and
continuity of the AC adapter cable.
Pin Voltage (V dc)
1 +19.0 to +21.0
2 Ground
Model N51 (8551) 81
To Next Page
Loading...
Need help?
General