Question about HP Deskjet 3845 InkJet Printer
Replaced black ink cartridge, now printer won't print
Posted on Oct 31, 2008
3120 printer won't print black after new cartridge installed
Posted on Sep 25, 2008
Either the print head for black is faulty, or the wiring to the black print head on carriage are broken. Try also cleaning the metal sensor to the black cartridge inside the ink carriage.
Posted on Apr 18, 2009
I have had the same problem It is the print head not the cartridge If your printer is still under warranty have the printhead(s) replaced if not Open the unit where the print heads are and hold the OK button for 5 seconds. The Print head carriage will move to the left
Carefully remove the KY (Black & Yellow) Print head with a cotton swab and alcohol clean the contacts and replace the printhead. If this does not work remove the printhead and then with a spray bottle spray the nozzle area on the bottom (DO NOT TOUCH THE NOZZLES AS THEY WILL BE DESTROYED) HP techs have told me this will void any warranty so act accordingly I use a printhead cleaning solution available from most any online ink supplier
Replace the printhead after it has dried out (less than a minute). The printer will then go through an alignment cycle and should print I had to do this several times before the print head performed as it should
Posted on Jun 16, 2009
Take the "empty" cartridge out and shake it, and then reinsert it. I did that on my HP 8500 and it worked. The indicator light showed it was full.
Posted on Nov 01, 2010
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