The center pin is required to complete the battery charge circuit -- the usual cause of an adapter recognition failure is either a bad plug on the adapter or a bad jack inside the system.  
Hello, tried to reply to this thread, message board wouldn't let me: [URL] getting this when starting up my Inspiron 15-3552, then the CPU would run at lower frequencies but ONLY WHEN ON AC. On battery the CPU still runs at its nominal speed, up to 2.4GHz - however this is a problem because i can't charge the battery now. This was happening sometimes, then more and more often, now it's showing this warning at each boot, and the CPU can't run at more than 480MHz. I mainly use the laptop on AC power, so i don't really mind the battery not charging, but however the CPU running at 20% of its speed makes this laptop pretty much useless.This laptop originally had a broken motherboard with a dual-core celeron (soldered directly) and a 32GB MMC chip. I replaced the motherboard with a more powerful one (basically same board but has a SATA connector instead of MMC chip, and i7 quad-core) but i'm still using the same AC adapter. New board's BIOS says it needs 45W, and the adapter says 45W on it. I also tried both female power sockets which connect to the motherboard.Passing "processor.ignore_ppc=1" on my kernel command line (Linux Mint 20.1) doesn't seem to change anything, though it shows in my /proc/cmdline so i know my bootloader is passing the correct comand line to the kernel.
BIOS says "AC power adapter wattage and type cannot be determined"