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March 15th, 2025 08:56

Dell 7210 2-in-1 weird charging behaviour

I'm using an aftermarket USBC PD65W charger. When it works the tablet pulls 0.7 to 2.2Amps.

If I turn off the computer (sleep or restart isn't good) after a few seconds the charger switches to 20V and starts charging like it should. BIOS says 65W AC adapter.

If I unplug and plug it back while Windows is running I get the 5V output flashing which means there's communication but no agreement.

Leaving it plugged in it starts charging randomly. But if I turn the charger off and on it doesn't start charging.

Installed all the drivers, bios update nothing helped.

When I started to install windows 11 it started to change but even with 11 it has this behaviour.

Thunderbolt I disabled.

Peak shift etc is set to 100% and is disabled.

I've used a 100 of this charger in the past with Dell 5290 2-in-1 

I have seen this error on half of the 7210 I have purchased.

Any tips?

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March 16th, 2025 13:23

Original charger. It's better to take the original from eBay for 45 watts than the non-original for 65.

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