Is it possible for a HP Black Toner Cartridge to cause multiple printers to no longer recognize an 'Original HP Toner'? We have a new HP black toner cartridge, that after it was placed into two LJ5550 printers the printers now say that the any toner installed is not and HP toner. Even when I tried a third (known good toner) from a different printer we still get the not HP toner on both of these printers. I now have two printers that won't recognize any black toner as HP originals. I'm afraid to try it in a third one. Is it possible for a toner to damage the sensor in the LJ5550 printer?
David
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