ac adapter error with annoying beeps

so i had this laptop lying around in my house, and i said "why not make this laptop useful again?"
i got the laptop, plugged it in and i am greeted with an annoying alarm beeping sound with an ac adapter error. the beeping was very loud too!
there also was no operating system, so i decided to install linux mint, which was slow, but that doesnt matter. the beeping stops when it boots into an os by the way.
the error message is this:
"
The AC power adapter wattage and type cannot be determined.
The battery may not charge.
The system will adjust the performance to match the power available.
Please connect a Dell 45 W AC adapter or greater for the best system performance.
"
i was using a third party adapter. later, i plugged in an official dell 45w ac adapter, as it suggested, and the same error happened.
any help would greatly be appreciated!
(specs are 32gb emmc storage, 2gb ram, intel celeron n3050 with integrated graphics)