Printer error light is blinking

Most printers put a small symbol beside each light. A drop or cartridge points to ink or toner, a sheet of paper points to the paper supply, and a triangle or exclamation mark usually means general attention, such as a jam or an open cover. A Wi-Fi symbol relates to the network rather than a printing fault. If your printer has a screen, its message gives more detail than the lights.

The print queue, the maker's app or your phone's print screen often shows the error in words. On Windows, open the printer's queue from Printers & scanners; on a Mac, open System Settings > Printers & Scanners, select the printer and click Printer Queue.

Open and firmly close the front cover, the ink or toner access door, the scanner lid and any rear door or duplex unit. Each should click shut. A latch that doesn't catch, or a broken tab on a door, can make the printer think it's still open.

Take the paper out, square the stack, put it back under the maximum fill mark and slide the guides against its edges. Then turn the printer off, unplug it and shine a flashlight into the paper path and output area for torn pieces. After clearing a jam, plug in, turn on and press the OK, Resume or Continue button if the printer asks.

Open the access door, wait for the carriage to stop on an inkjet, and press each cartridge in until it clicks. Make sure any protective tape or cap on a new cartridge has been removed. Steady and flashing ink lights mean different things on different brands (low on one, empty or not recognized on another), so check the manual before buying ink.

Some printers report errors with a set number of flashes followed by a pause, or by alternating two lights. Watch for a minute, write down which lights flash, their colors and how many times, and look up that pattern in the troubleshooting or light-pattern section of the manual or on the manufacturer's official support site.

Turn the printer off with its power button, unplug it from the wall and the printer, and wait 60 seconds. Plug it straight into a wall outlet rather than a power strip and turn it on. A one-off glitch usually clears; a real fault returns within a minute or two.

All lights flashing together, or a pattern that doesn't match any paper, ink or cover symbol, usually means an internal error such as a blocked carriage, a firmware problem or a failed part. After a power reset, check the carriage path for obstructions. If the pattern comes back, note it down and contact the manufacturer through its official support website.