I recently refilled a HP92 inkjet cartridge. After doing so I would get a warning telling me that the ink level was low and asking me if I wanted to proceed. However this is only a warning and the printer should print anyway. So I've been disregarding this for a month now and haven't had any problems. However, last night I tried to print a page and it came out compleatly blank, no trace of black ink at all. I removed the cartridge refilled it and tested that it would flow out of the print head and replaced it. It still won't print black! I've tried printing a test page but nothing has worked. Anyone know what the problem could be? any help would be appreciated.