Your department's laser printer recently began printing a vertical black line near the edge of every printed page. What should you do to resolve the problem?

Replace the toner cartridge

Explanation:

solution

when laser printer print black color liner vertical line print it is very frustrating that condition nearly empty toner cartridge

but first we clean the corona wire for that color line

and Reinstall the toner cartridges after Shake the toner cartridge side to side

if problem not solve than Clean the drum unit

and finally if not solve change the toner cartridge

so as that our problem will be resolve