Charger has a cracking/ticing sound

Hey there, i didn’t use my board (diy) for a long time now (about a year) and now i can do it again, but when i startet charging the charger started to have a cracking or ticing sound, so i stopped charging, normally it starts to shine solid red when plugged into the wall and red when charging, green was normal, but when activly charging it started ticing and the light started flicering with the tics, the tics get quieter with time and the time intervall of them gets bigger, but i didn’t charget longer that about 5 sec coz i am afraid it coud end bad, what should i do ? just buy a new charger and hope the problem fixes itself like this?

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