I had to fix the bathroom sink which took longer than I thought and now I have to clean up a bit because the glass fiber man is coming tomorrow and replacing my modem.

No surge protector, but I do have some kind of electrical issue. Sometimes when I plug something in or turn something on, a usb device on my pc disconnects and reconnects. But that is all the symptomes I got and I've been trying to hunt that down for a while. I'll check power draw and see if I get voltage drops. I have to find out what's going on some day.

I cleaned the image drum and transfer roller but they weren't really dirty and images look identical before and after.
Toner is full. I can see when I take out the toner cartridge that the part with the image drum is filled up.
ink does not scratch off at all. I did replace the toner cartridge with an aftermarket one circa 1000 pages ago. maybe I got scammed with bad toner.

Since I literally didn't move or touch it, I think power supply issues sound reasonable. We've had some thunderstorms... and the issue with my pc... I can imagine that it's a blown capacitor due to thunderstorms. I should probably get surge protection.

I haven't found out how to do a recalibration. It's an oki 4131 which looks identical to all 400 series printers. Honestly... it prints text. I'll give it one more go tomorrow, but if that fails I'll live with the print quality or it gets the hammer.