"Low Wattage AC Adapter" Error - laptop not charging at all.

[midnight elk]

Hi, details below! Thanks!

Model: Y540-15IRH

Issue: Laptop isn't charging and I'm getting the low AC adapter wattage error message on start up (see photo). However the orange charging status LED is on. I don't have the original charger because that stopped functioning a few years ago but I do have an official Lenovo replacement which is the same wattage and has been working perfectly since.

What I've tried: I purchased another Lenovo 230W. I've also replaced the battery with a compatible one. I checked vantage and there's no software updates. I've tried both soft and hard EC reset. Still no change.

I used a mains power meter and I can see that the charger is drawing 0W from the wall when powered off, and when I power the laptop on it jumps to ~60W, but the battery level never increases.

I've even stuck a multimeter on the charging port and the correct voltage is coming in. Similarly the CMOS battery is over 3V.

When: Last week. I was using the laptop on battery without issue and plugged it in to charge overnight. Next day I noticed to orange light was still on.

New Drivers/SW: No new software installed as far as I remember. Possibly graphics drivers a few days before but that's it.

I'm at a loss with this one. I assume there must be some damage to the battery management circuitry but I can't see any obvious signs of damage.

Any help greatly appreciated! Or even if someone has seen this before and can just confirm it's the end would be helpful.

[left horizon]

Is your charger Lenovo original?

I would try with an original Lenovo charger.

[midnight elk]

I don't have the charger from the box as it stopped working a while ago. The one I have been using is an official Lenovo one I bought last year, of the same wattage, though its the slim version. And as I said, it's been working fine for the last year.

[vapid finch]

@midnight elk did you ever fix it?

or any solution?