Dell AIO 962 copy & fax issues

I have a Dell 962 all in one with two major problems, both very recent in its 2 year history of acceptable performance:

1. Copies are not readable due to black lines and gray areas
2. When used as a stand alone fax it transmits pages of solid black.

The printer and scanner functions work fine.

I have recently changed the printer cartridges, cleaned the large scanner glass and the thin glass lens below the automatic document feeder. I am sure that the original is oriented with the correct side up when sending the faxes.

I have been unable to find any references to this combination of problems.

I have a 2 year old Dell Inspiron computer with Windows XP Pro, and am subscribed to Bell South fast access (now AT&T)

Any suggestions or references toward a solution would be greatly appreciated.

Thanks,

kellyplus