07-03-2018 12:20 PM - edited 07-03-2018 12:21 PM
My lenovo z570 started having this problem yesterday. It was working properly when suddenly the battery icon started switching between charging and not charging mode repeatedly. At first I thought it there were some loose connection but there was not.
If I turn off my laptop it is gettjng charged properly. But if I turn it on keeping the charger connected the battery icon switches repeatedly and the charger led also flickers.
07-03-2018 02:39 PM
Welcome to the Community Forums.
I would initially suspect battery failure (base on the model release). It would help isolate if you can have the machine checked with another known good battery first.
Try to connect the charger without turning on the laptop for 1-2 hours as the battery indicator should progress from blinking amber to solid white (assuming that the charger is ok specially if another known good charger is also used). Then try to proceed with measuring the voltage as described here (page 22).
I hope this helps answer your query.
Update us how it goes on your end.
07-03-2018 05:46 PM
This a WAG:
Since you say it charges correctly when off but "flickers" when on, I wonder if your charger is shutting down from over-current or over-temp condition. If that's happening it may be resetting and trying again quickly after disconnecting itself.
The laptop draws more power when charging AND running. It could be the battery as spidey suggests, or a problem with the charger or the laptop's power circuitry. The charger may be incorrectly detecting an "over" condition, or the laptop may actually be drawing too much current.
You may need another power brick to try.
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