My printer left spots on the pages. I first replaced the toner but that didn't help. Apparently this problem is usually related to a drum problem. It was a bargain price and extremely easy installation. My print quality improved immediately and the smudges were gone. I've used multiple toner cartridges so I think it's related to the new drum. I have since learned that the drum should be replaced every few toners. I considered just buying a new printer but am very glad I went with the drum. Significantly cheaper and I don't have to go through all the settings again. It's also better for the earth than replacing the entire printer.
HP 62XL Tri-color High-yield Ink, Compatible with HP ENVY 5540, 5640, 5660, 7640 Series, HP OfficeJet 5740, 8040 Series, HP OfficeJet Mobile 200, 250 Series, Instant Ink Eligible, C2P07AN
12 Review
H&BO TOPMAE Remanufactured Ink Cartridges Replacement for HP 61XL 61 XL β Envy 4500 5530 5535 Deskjet 1000 1056 1510 1512 1010 1055 OfficeJet 2620 4630 Printer (1 Black 1 Tri-Color) - Enhanced SEO
13 Review
Cartridge NV Print CE285A for HP LaserJet Pro P1102/P1102w/M1132/M1212nf/M1217, black
13 Review
Get Quality Prints with HP 78A/CE278D Toner-Cartridges for LaserJet Pro M1536 and MFP P1606
11 Review
Smartphone Samsung Galaxy A50 4/64 GB, 2 SIM, black
82 Review
π» Get Amazing Video Quality with Logitech HD Pro Webcam C920 (Discontinued Edition)
83 Review
Apple AirPods Pro MagSafe RU Wireless Headphones, White
159 Review
Enhance Your Visual Experience with Logitech C260 Webcam
78 Review