Lexmark 436 Scanning takes too long or freezes the computer, Poor scanned image quality, Step

Troubleshooting 314

Scanning takes too long or freezes the computer

Action	Yes	No
Step 1	Go to step 2.	The problem is solved.
Check if other applications are interfering with the scan.
Close all applications that are not being used.
Does scanning still take too long or freeze the computer?
Step 2	Contact customer	The problem is solved.
Select a lower scan resolution.	support.
Does scanning still take too long or freeze the computer?

Poor scanned image quality

Action	Yes	No
Step 1	Clear the error	Go to step 2.
Check if an error message appears on the display.	message.
Is there an error message on the printer display?
Step 2	Go to step 3.	Increase the scan
Check the quality of the original document.		resolution settings for a
		higher‑quality output.
Is the quality of the original document satisfactory?
Step 3	Go to step 4.	See “Cleaning the
Clean the scanner glass and the ADF glass using a clean, lint‑free cloth		scanner glass” on
dampened with water.		page 210.
Is the scanner glass clean?
Step 4	Go to step 5.	Place the document or
Check the placement of the document or photo.		photo facedown on the
Make sure the document or photo is loaded facedown on the scanner		scanner glass in the
		upper left corner.
glass in the upper left corner.
Is the document or photo loaded correctly?
Step 5	Go to step 6.	See “Print quality
Send a print job, and then check for print quality problems.		problems” on
		page 282.
• From the General Settings menu, adjust the Eco‑Mode settings.
• From the Copy menu, adjust the Darkness setting.
• When the print becomes faded, replace the toner cartridge.
Is the print quality satisfactory?