You swore that cartridge still had ink. The printer disagrees. HP’s "Memory Chip" on the cartridge has flagged itself as empty or expired. Even if you shake it, the chip refuses to lie. The error appears because the printer tries to wake the cartridge, and the cartridge whispers back, "I am nothing."
The number "63" in HP language refers to the . The ".00.3C" part? That’s HP’s way of saying: "I see a cartridge in there, but I cannot feel its soul."
In plain English: Your printer has detected a cartridge, but it cannot establish a proper electrical connection with it. The cartridge is physically present, but digitally invisible. This error doesn't appear randomly. One of three sneaky culprits is to blame:
It looks like a secret code from a spy movie. It feels like your printer just started speaking in hexadecimal curses. But don't call an exorcist (or the IT guy) just yet.