Black at the bottom of scanned pages

Select Auto for page size. The scanning software displays scanned image in many options, including 'fit'. Choose 'fit' so that you see complete image.

S. Mohan

Scan with Auto page size

Switch the little button on top of the scanner next to the 3 buttons. This switches between 1 page or multiple page.

A.Misset
Installing these devices in the Netherlands.

Check your scanning software settings. If you are getting only one file output, then you must have chosen 'multipage' option.
S. Mohan

If the rollers are old, you need to change it, else clean with a damp cloth. Dont use solvents. Ensure the papers are not sticky, loosen them if required.
S. Mohan

I havent used Canon 2580C and hence cant comment on Scan Panel. But you can download SU5000 or Captureperfect 2.0 from Canon website (http://software.canon-europe.com/). This is easy to use and probably offers more features as compared to ScanPanel. Canon 5010C is a higher model as compared to 2589C and Captureperfect may offer better user interface.
S. Mohan. Chennai, India

In Captureperfect, select page size as 'Scanners Maximum'. Select automatic paper size, check the output now. If you select bigger paper size and smaller paper, you will see lack output, outside the paper area.
S. Mohan, Chennai, India

Try and scan a white paper. If the output is black, then may be the LEDs are not glowing, likely the wire is loose. Actually it is not easily reacheable! Try duplex scanning to check if both scan modules are fine.
S. Mohan

The staples cannot reach the sensors. They could have scratched the glass above the sensors. Clean the glass with IsoPropyl alcohol. Try scanning a few images to find if the scratch marks are on the same place on all images. Once confirmed that the glass is scratched, you can change the glass. You need a technical expertise to change or call service staff.

You must have 'checked' the multipage option in the scanning software. Try scanning first page only and store as say temp1 and later all pages as temp2. If the file size is different you can deduce that the scanner has scanned all pages! To view multipage files, you need a proper software.

S. Mohan, Chennai