Latitude Not Charging with Unknown AC Adapter Alert Message
Summary: Resolving laptop not charging due to "Alert! Unknown AC power adapter, may affect performance" messages on the Latitude 3420, Latitude 3520, Latitude 3430, and Latitude 3530.
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Symptoms
The computer shows " Alert! Unknown AC power adapter, may affect performance" (Figure 1).
Figure 1: "Alert! Unknown AC power adapter, may affect performance" error message
Affected Platforms:
- Latitude 3420
- Latitude 3520
- Latitude 3430
- Latitude 3530
Cause
AC adapter cable is not fully connected.
Resolution
The error message can be resolved but ensuring the AC adapter cable is correctly connected to the laptop (Figure 2 & 3).
Figure 2: Not fully connected
Figure 3: Fully connected
Affected Products
Latitude 3420, Latitude 3430, Latitude 3520, Latitude 3530Article Properties
Article Number: 000218291
Article Type: Solution
Last Modified: 22 Apr 2025
Version: 4
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