Lexmark X364dn - Toner Specks; Transparency Print Quality is Poor; Streaked Horizontal Lines

Toner specks
These are possible solutions. Try one or more of the following:
THE TONER CARTRIDGE MAY BE DEFECTIVE
Replace the toner cartridge.
THERE IS TONER IN THE PAPER PATH
Contact Customer Support.
Transparency print quality is poor
C
HECK THE TRANSPARENCIES
Use only transparencies recommended by the printer manufacturer.
CHECK THE PAPER TYPE SETTING
Load transparencies, and make sure the Paper Type setting is set to Transparency.
Streaked horizontal lines
These are possible solutions. Try one or more of the following:
THE TONER MAY SMEAR WHEN PAPER IS FED FROM A SPECIFIC SOURCE
From Print Properties, the print dialog, or the printer control panel, select another tray or feeder to feed the paper
for the job.
THE TONER CARTRIDGE MAY BE DEFECTIVE
Replace the toner cartridge.
Troubleshooting
206