It will print intermittently page with high magentish background(there are some blue lines/stripes in background) see attached.
They said this example happened after printing BW document of two pages, first comes OK this is second. Text is also OK on second page but you can see the background.
It's very intermittent though. Printer is clean, new DU.
I lean towards high-voltage power supply PCB, maybe laser unit.
Anyone seen this?