The “IBM AC power adapter type cannot be determined” problem description
I have brand new IBM FRU 92P1139 Battery.
Battery fully charged, when I unplug the charger from the wall, but let the plug in the Inspiron for a while (let’s say a night), when I startup my computer, I get the message “The AC power adapter type cannot be determined. Your system will operate slower and the battery will not charge. Please connect a Dell 90W AC adapter or higher for best system operation” (needless to say that the power adapter IS a Dell 90W…).
Unplugging and replugging the adapter solves the problem.
The problem happens frequently at IBM FRU 92P1141 Battery, IBM FRU 92P1137 Battery, IBM 02K6651 Battery and so on.
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