Dell E Series 교육 - 페이지 29
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페이지 인쇄
1. Disconnect the AC adapter from the notebook and the power source.
2. Verify the power source with another
electrical device.
3. Reseat the power cord that attaches to the
adapter. Swap it with a known good cord, if
possible.
4. With the adapter still disconnected from the notebook,
plug the AC adapter directly into a wall outlet and wait for
the LED on the AC adapter to stabilize.
5. Check the AC adapter LED for a steady state. If the LED is
steady green/blue, the AC adapter is working correctly. If
the LED blinks or does not appear, replace the AC adapter.
6. Remove the battery from the notebook. If the battery has a self‐
test, determine its charge state.
7. With the battery out of the notebook, test the notebook with a
known good AC adapter. If the AC adapter LED changes from solid
green/blue to off or starts blinking only when connected to the
system, the charger board on the system board is probably faulty.
This condition necessitates replacing the system board.
NOTE: The adapter cables should not be wrapped around the brick. If the connector on the adapter
plugs into the notebook, it could fray or split where the connector joins the cable. Wrap only the cable in
on itself. Use a "twist tie" to hold the loops together.
Make sure you are using the correct AC adapter. The newer notebook systems that are shipping with
Pentium 4 processors require a 90‐watt AC adapter. If you attach a 70‐watt adapter, the system will halt
during POST.
For the Latitude XT, the system, the battery slice, and the media base all ship with their own AC
adapters.
•
The 45‐watt adapter that ships with the Latitude XT cannot charge the battery slice.
•
The 65‐watt adapter that ships with the battery slice can power the Latitude XT.
BIOS LED Codes
The BIOS uses LEDs to relay error code information critical to understanding POST stage failures. Read
the LED codes from left to right, regardless of what the LEDs are actually labeled. The codes can differ
based on the BIOS version. Always check your system's system‐specific documentation.
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