Incomplete Black Printout with White Streaks

[abhirajdhr]

Hi everyone,

I own an HP Laser MFP 136w. Recently, the black parts of my printouts have not been continuous and are streaked with vertical white lines. To summarise my point, I have attached a JPEG file below, of a scanned printout of a fully black page. There are no apparent software issues, and I am using a wireless internet connection.

I would appreciate it if someone looked into why this is happening and how I can resolve this issue. If you require any additional information, feel free to ask me.

Thanks.

[Valsimot]

1st step is to replace the toner cartridge.

[abhirajdhr]

Hi Valsimot,

Thank you so much for your response. I just had one question - would I have to replace the whole toner unit or just the toner powder?

[Valsimot]

Whole toner.