No internet with external power on L20

Can connect to internet when my L20 runs off own power pack, but when battery level goes low and asks for external power, internet connection is lost when my mains power adaptor attatched. Also, internet will not connect if external power supply is used from the outset. Disconnect external power and run on battery pack, internet connection can now take place !! Any thoughts.

Try checking that the polarity of the dc power coming out of the ac adapter is correct. In fact check that you have any dc voltage coming out of the adapter.
I don't really understand what you're describing. Are you really saying that ONLY the internet connection is affected. That everything else is working ok on mains power. The power and disk indicator lights are all on; the battery charges up ok; the screen is lit; the fan is running and that these things will continue to work if you then removed the battery? (Except the battery charging of course).

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