Question Laptop charger goes off when connected with battery, but works without it

[dl57]

When I connect my laptop charger to the laptop, the green light goes off and the battery isn't charging. Now, when I pull off the battery from the laptop and connect the charger to the machine, it works perfectly fine and I can use the laptop.
I know there is a big amount of topics about chargers going off when connected and people usually respond that the problem is the motherboard. But in my case, I can actually use the laptop without a battery as said previously, so I'm not sure if the laptop itself is the problem or not.
Speaking about batteries, I thought the battery was the problem, so I bought a second one. It works. It came precharged and I could turn on the laptop without the charger. After connecting the charger to the working laptop nothing happened, it didn't start charging, but the charger itself instantly turned off (green light went off).
So I need to understand whether the charger is the problem or the laptop. Thank you! The laptop is Inspiron 5520

 

[Lutfij]

Welcome to the forums, newcomer!

I don't think there's anything wrong with the battery or the motherboard per se, but I do believe you might have a problem with either the circuitry that feeds power to the laptop's motherboard which ironically is soldered on the motherboard via capacitors and SMD/VRM's or that you might have a compromised adapter that can't deliver power to the laptop and the battery, considering that the laptop needs to charge the laptop's battery and keep the laptop powered up.

Have you tried charging the battery while the laptop is not in use(shutdown)? You should source a donor adapter that's meant for your laptop, just because another laptop's adapter might have the same pin design, doesn't mean that the wattage will be the same hence why I've asked you to source a donor adapter for the laptop you're on.

On a side note, can you check and see what BIOS version you're on? Dell and HP laptops are notorious for not working well with non genuine laptop batteries.

 

[dl57]

Welcome to the forums, newcomer!

I don't think there's anything wrong with the battery or the motherboard per se, but I do believe you might have a problem with either the circuitry that feeds power to the laptop's motherboard which ironically is soldered on the motherboard via capacitors and SMD/VRM's or that you might have a compromised adapter that can't deliver power to the laptop and the battery, considering that the laptop needs to charge the laptop's battery and keep the laptop powered up.

Have you tried charging the battery while the laptop is not in use(shutdown)? You should source a donor adapter that's meant for your laptop, just because another laptop's adapter might have the same pin design, doesn't mean that the wattage will be the same hence why I've asked you to source a donor adapter for the laptop you're on.

On a side note, can you check and see what BIOS version you're on? Dell and HP laptops are notorious for not working well with non genuine laptop batteries.

Thank you for your answer!
Just tried to connect the charger to the battery while the laptop was shut down. The green light kinda went more faded, then went off completely after a couple of seconds. Unfortunately, I don't have any other adapter. I can buy one, I'd just like to be sure the problem is with the adapter, not the motherboard.
About the BIOS. Yes, I've also seen some topics about the bios and I've tried to upgrade it, but ironically the driver is programmed in a way you can only install it if battery AND adapter are connected at the same time. Impossible in my case, so this is just a paradoxical situation for me.