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Y4070Electronic
Paper Tape
Posts: 1
Registered: ‎07-28-2017
Location: US
Views: 190
Message 1 of 2

Y40-70 Adapter has limited support

I've had my laptop for 2 years and it came with a 90w charger and a month ago a popup started saying "Adapter has limited support..." so I just bought another 90w adapter off of the this site and it says the same thing still and it won't charge anymore. What do I do?

Support Specialist
Posts: 2,948
Registered: ‎02-22-2017
Location: GB
Views: 154
Message 2 of 2

Re: Y40-70 Adapter has limited support

Hello Y4070Electronic

Thanks for using the Lenovo forums.


Try a static discharge for this, it may help to resolve the issue or at least get rid of any built up static on the motherboard.

(If the battery is internal, please just skip the remove/replace battery steps.)
1. Turn the unit off
2. Remove the battery and the Mains adapter
3. Press and hold the front power button for 30 seconds
4. Replace the battery and the Mains adapter
5. Turn the unit on as normal


Hope this helps, let us know how you get on.


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