Unable to identify AC power adapter

Recently, QuickSet starting spouting this error when I docked the computer.  I am using the Dell 90W power brick that came with my d/Dock.

"Unable to identify AC power adapter connected to the docking station.  This will prevent the system from charging the battery.  Please connect a Dell 90W AC adapter or higher to the dock for best system performance."

A different message is displayed when I undock the notebook, and connect the power supply directly to the system:

"The AC power adapter type cannot be determined.  Your system will operate slower and the battery will not charge.  Please connect a Dell 65W AC adapter or higher for best system performance."

I do not see any similar errors when I connect one of several Dell 65W bricks while the system is undocked.

However, if I try to connect a 65W brick to the dock, I see this message (as expected):

"A 65W AC power adapter has been detected in the docking station.  Your system will operate slower and the battery may take more time to charge.  Please connect a Dell 90W AC adapter or higher to the dock for best system performance."

I suppose this means that my 90W AC adapter is toast.  Is there any thing I can do to salvage it?

Best regards,

Tim ==