Printed information is to light and cannot darken.

Ho Renee,
i Will Send You Video please watch this video and fix your error
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You can usually can only alter or darken a print colour from the software program (i.e. Word), then send your document to the printer.

The developer should have been replaced by the technician. the solution is simple...replace the drum and developer and you will have nice crisp prints and copies.

Try to use the Lexmark All-In-One Center Application on your computer to adjust the darkness of your prints. On your computer, click on Start > Prorgrams > Lexmark 2600 Series folder > select All-In-One Center. From the Copy tab, select "darken" copies.
For printing, Normal or Best mode in the Print Setup properties before sending the print job to the printer for printing.
Should you still need assistance, please leave a comment to my response and I'll get back to you. Should this resolves your problem, your rating will be greatly appreciated.

Hold the go button til the lights flash faster and release. First the lights flash and that makes a demo print, holding til they flash faster will give you a report. Make sure in that report and in printer properties that toner save is turned off, if still too light you may need a new laser unit as they lose power in time, I would try another toner cart. before buying a laser.

it may be your toner ink is low try to give print in best mode if you success then good otherwise change the toner.

I have found that when scanning b/w documents, its helpful to start with a black and white copy, not a grayscale, pen written, or printed form a printer in grayscale mode copy, but a true black and white on the copier or fax copy. The scanner doesnt read shades of black so well and when scanning multiple page documents, my pixma tends to scan in lightly. I havent found a piece of software to do just this, batch darken what has been scanned (at least not for free). Copying before scanning is the work around. Hope this helps everyone who's had this problem. It also doesnt hurt to darken what your scanning down a notch when copying

First clean the cartridge and then go to toolbox and give test print.

Go into the fx toolbox and adjust the print dencity to 4. This will darken the print.

Read your instruction book its all in there.
We all need to learn how to do these things but sometimes its best just to sit down a read the book for 1 hour or so.

Anyway to make a document or photo print darker;
Go into Printer preferences
Effects
Check the box; Simulate illustration
Then move the contract bar to you setting you require
You have other option in the as well such as;
Vivid photo
Image optimizer
Photo Optimizer pro
Photo Noise Reduction