Can anyone suggest what causes these lines across the page?
Is a new toner cartridge likely to fix this?
Edit: Line separation is 62.5mm
Edit 2: Thank you to everyone who replied. I've ordered a new toner cartridge and will update this if that solves the problem ๐ซก
Final update: A new toner cartridge fixed it. It's now printing perfectly! Thank you.
I think your fuser roller may be dirty or damaged. Try printing several pages that are blank or nearly blank. If it's dirty, the lines should get progressively lighter. If not you may need a new fuser.
You can buy a fuser repair kit for your printer model online. They are usually only slightly more complicated than changing out the toner cartridge. Just be sure to lay down several sheets of printer paper to cover your work area to catch any toner dust.
And a word to the wise for anyone attempting home laser printer repairs. Do not use a vacuum cleaner to suck up any spilled toner. Wipe it up with a damp paper towel or something instead.
Printer toner is so fine that it will sail right through the bag or filters in your vacuum cleaner and then get dispersed forcibly into the air. You know how microplastics are a big deal nowadays? That's what printer toner is. With a vengence.
Toner rated vacuum cleaners do exist but they're expensive, and nobody not doing printer repairs commercially will want to spend the money on one.
โ ๏ธ Thank you for that warning (and explanation). I would definitely have used a vacuum if it happened before reading this ๐