No tools, disassembly, or reset key required.
However, is it satisfying? Absolutely.
Now, most normal human beings would sigh, drag the brick of plastic to the recycling center, and buy a new one. But I looked at my ET-4800. I looked at the bottles of ink I still had. I looked at the price of new printers. And I decided to go down the rabbit hole. epson et 4800 ink pad replacement
If you see and you have already replaced the maintenance box, this refers to a different internal pad (the ink absorption pad under the print head). That error requires Epson service or third-party repair with a reset utility. The ET-4800 rarely triggers this unless the printer has been heavily abused or leaked. No tools, disassembly, or reset key required