Printhead has a problem HP Office Jet Pro L7590

SOURCE: Blank Ink not pumping to print head

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.

SOURCE: hp 6500 office jet refill

to refill 920:

1. If you have the plastic cap that covers the 9 mm. hole where you can see the sponge, then tape this cap to the cartidge with scotch tape. If not, use some duct/masking tape to cover the round hole.

2. Use the dry hypodermic needle to find the hole that will be found at the very center of the 920 label. With the needle, pierce the label.

3. Fill the hypodermic needle with 4 cc of ink.

4. Insert the needle 2-3 cm. into the hole made in step 2. Draw out 1 cc of air, then slowly force the 4 cc of ink into the sponge. Use toilet tissue to absorb any ink that might have escaped.

5. Let the catridge stand overnight (if possible) so as to allow the ink to evenly saturate the sponge. If not, insert it into your printer immediately.

Note: If you are going to refill catridges, be certain not to allow the sponge to dry completely. Thus, you might want to do step one immediately and to enclose it in a sealed sandwich bag upon removing an empty catridge from your printer even if you are not going to fill it immediately.

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SOURCE: hp 920 xl ink cartridge filling instructions anyone have them

to refill 920:

1. If you have the plastic cap that covers the 9 mm. hole where you can see the sponge, then tape this cap to the cartidge with scotch tape. If not, use some duct/masking tape to cover the round hole.

2. Use the dry hypodermic needle to find the hole that will be found at the very center of the 920 label. With the needle, pierce the label.

3. Fill the hypodermic needle with 4 cc of ink.

4. Insert the needle 2-3 cm. into the hole made in step 2. Draw out 1 cc of air, then slowly force the 4 cc of ink into the sponge. Use toilet tissue to absorb any ink that might have escaped.

5. Let the catridge stand overnight (if possible) so as to allow the ink to evenly saturate the sponge. If not, insert it into your printer immediately.

Note: If you are going to refill catridges, be certain not to allow the sponge to dry completely. Thus, you might want to do step one immediately and to enclose it in a sealed sandwich bag upon removing an empty catridge from your printer even if you are not going to fill it immediately.

SOURCE: HP OFFICE JET PRO L7500/L7600/L7700

my hp office jet pro l7500 indicates the ink has expired in all cartages but the cartgages are new because they were just put in . Before the same error code came up and so bought new cartages. Also the door to the cartages will not stay closed without tape.

SOURCE: I refilled HP 88 cartridge but printer (Officejet

Under the cartridge is a black like pump - on a new cartridge this is hard and rests firmly on an area inside your printer. As you print, the pump becomes softer - this is how the printer determines it is empty. Once refilled, the pump does not get back to the original state. Open the bottom of the cartridge and put a firm solid piece of folded paper in there - make sure it is steady and re-close cartridge. It will now read as full but may also show full - judge ink levels by the quality of print. Also make sure chip has not expired.