Here is the problem. I ran out of black ink in my HP L7590 AIO printer, faint black print with white streaks. Installed new printer cartridge (alas aftermarket from LDProducts... used one of their cartridges before with no problem). The printer refused to print black. Cleaned the head as per instructions several times, automatically and by hand with cleaning solution. Result is the same... First page prints ok (the black is a little light, not deep black as before), second page prints about half and then goes lighter and streakier. Finally looked at the tubes going to the printhead. All of them are full, except the black... has a nice long stretch of no ink. I tried inserting and reinserting black ink cartridge. I even opened another new cartridge and put it in. To no avail, the black ink is apparently not pumping to the print head. The other inks appear to deliver o.k. to the printhead, their tubes are full... no bubbles or empty stretches like the black line. Any suggestions on what to try next?
Cheers - Richard
Turn off the device after removing the printhead
After removing the printhead, turn off the device, wait about 20 seconds, and turn it on again without the printhead installed. After it has restarted, reinsert the printhead.
it will go through this long routine of perhaps 20 min or so. after its compleate it should print great.
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I have the same problem...tried replacing the black ink cartridge and, if anything, it is worse.
Thanks rstar111 :-)
I tried that twice. Went through the 20 minute routine both times. But both times it gave me the message "alignment failed"... and the black is still NOT printing :-(
Called HP trechnical support (I hate that!) and went through a one hour gig with them. They told me to disconect power, push on/off button 25 times, hold down # and 3 key while reconnecting power. Printer went through some weird reset. They had me do the same gig while holding down # and 6 button. Then the printer came back with "Following cartridge not intended for use in this printer: Yellow"... needless to say, it never did that before... Of course HP blamed the printer malfunction on the aftermarket cartridges and asked me to first install genuine HP cartridges (Which I will do next week) and see if the problem persists. If so, I am supposed to call them back immediately with my ticket number and they will fix it... (It is still under warrenty :-)) I will keep posting the results here and let you know what happens!
I have the same problem went through all the garbage with HP Support, to their credit sent me a new printer within three days.
Problem is the new printer does the same thing, they were supposed to send a new black/yellow print head didnt happen.
This printer is a business printer and I depend on it it has been off the air for at least a month.
I tried to talk to a person based in Australia as all I kept getting told by offshore support is that they have stock issues with the print head, but it hasn't stopped the supply for new printers I've noticed.
When I was finally put through toa tech in Australia I got an answering machine left message still waiting for call back.
Pretty poor effort HP, I still have a Compaq Presario waitng for a new screen booked in 18 months ago, I think this will be the last HP product I buy its a shame their products are normally pretty good lack of customer service and back up.
Bottom line I think your print head needs to be replaced best of luck.
Frank
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