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LX850-Magenta and Light Magenta not printing

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Microsoft Windows 7 (32-bit)

These 2 colors are not printing (or printing slightly)  The ink systems are good and under the proper pressures.

If there is a potential electrical issue causing this, does anyone have any suggestions on which boards to check or replace?  Fuses to look at?

I'm stumped.



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often problem with printheads (if not defective printheads) - not contacting well inside the carriage - gold plated contacts must be cleaned with alcohol and the contacts of the carriage must be cleaned too. Before first installing, printheads must be shaken well. Other problem - not very well seaten inside carriage...


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