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Resetting the HP C9351a (No21) - C9352a (No22) - c6656a (No 56) - C8727 (No 27) blacks - c6657a (No 57) - C8728 colour & C6658 Photo ink cartridges:-


InkTec Refill Kits for HP No 56 - 57 - 58 inkjet cartridges METHOD 1

1. Refill your Hewlett Packard ink cartridge using your Proprint supplied ink refill kit.

Now we explain how to reset the ink level gauge after refilling your HP 56 (c6656a) black and HP 57 (c6657a) colour inkjet cartridges! Also works on HP No 21 , 22, 27, 28 and 58.

Reset Ink Level on HP DESKJET 450 / 450CBI / 5550 / 5552 /  OFFICEJET 6110 2. To reset the HP 56 black ink cartridge or HP 57 colour ink cartridge, first tape over the contact pointed to by the arrow in the diagram on the left.

3. Install the ink cartridge back into your HP printer with the first contact covered with tape. See below for illustration of contacts. (One of the little gold-coloured squares is called a contact.)

4. The printer will tell you that there is a problem with the ink cartridge. Click "ok".  The printer will then start to print an alignment page.  Let the printer print the alignment page.

5. Remove the inkjet cartridge from the printer again.  Leave the first piece of tape on the contact first covered.  Cover the second contact shown in the picture on the lower left for the black ink cartridge or the contact in the picture on the lower right for the colour cartridge.  The second contact on the HP c6656a black cartridge to be covered is the top square on the next to last row from the left.  The second contact to cover on the HP c6657a inkjet cartridge is the top square on the last row from the left.


HP C6656 6. Install the printer ink cartridge again.  This time with both contacts being covered with tape. 

7. The printer will go through the same process as before, telling you there is a problem with the printer ink cartridge.  Again, click "ok".  The printer will start to print an alignment sheet.  Again, let the printer finish the alignment page. 

8. Remove the cartridge once more from the printer.  Remove both pieces of tape used to cover the contacts. 

HP C6657
 Make sure that there isn't any residue left from the tape on the contacts.  If you do see residue, gently clean the contact with rubbing alcohol.

9. Install the cartridge on final time into your HP printer.  The cartridge will now be read as new and full of ink.

Ink Level resetting for HP No 56

Green square = first contact to cover
Blue square = second contact to cover

Ink Level resetting for HP No 57

Green square = first contact to cover

Pink square = second contact to cover

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  1. With the computer off, remove the cartridge from the printer and cover contact #1 with tape.  Start up computer and printer should automatically print a test sheet.

  2. Take out inkjet cartridge and cover contact #2 with tape.  Reinstall ink cartridge.  Printer will make a little noise.

  3. Take out cartridge and cover contacts #3 & #4 with tape.  Reinstall cartridge.  (Printer will make a lot of noise.  If you check ink levels now with HP inkjet utility, you will be given a notice that printer is busy printing.

  4. Open printer lid and wait for cartridge to return to center.  Remove cartridge.

5.  Remove tape from Contacts #1, #2, #3, and #4.  Reinstall cartridge.  (If you check ink levels now, you will be given a notice that printer is busy printing.)

6. Turn printer off and then on again.  Check ink levels they should now register 100% full.  Printer should be ready to use.

METHOD 3 - Three Cartridge Method

On some models the above procedure won't work, and you'll have to fool the printer by keeping three cartridges on hand (these cartridges can be old, empty cartridges).  This works because the printer only remembers the last TWO cartridges which were in it.  The procedure is as follows:

  • Cart #1 (empty) is removed for refilling
  • Cart #2 is installed
  • Cart #2 is removed
  • Cart #3 is installed
  • Cart #3 is removed
  • Cart #1 (refilled) is installed.  The printer now thinks that the filled cart is new.
ANOTHER METHOD? - METHOD 4 - One of our customers used the procedure listed above to reset the ink levels on the cartridges HP 56 & 57 in an HP Photosmart 7260. this worked fine for the color #57 but he could not get the Blk #56 to reset using the procedures listed above, however he got it to reset by applying tape per step 1, reinstall, power down printer, power up printer.
Add tape per step 2, power down printer, power up printer.
Remove tape applied in step 1, reinstall, power down printer, power up printer.
Remove tape applied in step 2, power down printer, power up printer.
At this point going to Start, Settings, Printers, HP 7260, Properties, services, service this device, select the "Estimated ink level" which showed a full ink level.
At no time in the process for either cartridge did the printer / software indicate that there was a problem with the cartridge and want to run an alignment, which is why he substituted a power down.
Method 5

Another possible method I heard of which might work on HP Lexmark and Dell is to remove both cartridges from the printer, Power the printer on / off at wall supply about 6 times - leave 30 seconds or so between each power on / off to the printer. The idea here is that the printer without ink cartridges in has no cartridge "To memorize" and that at the end of the procedure any inkjet cartridge introduced is treated as a "New ink cartridge" - No confirmation yet that this method is effective


Recycle your printer ink cartridges to help the environment. DIY ink refill kits are an easy way to save serious amounts of money? If your laser printer copier or fax machine cartridge is empty!. Ink Cartridge Refill Don't send it to the Landfill! Refill with quality ink refill rolls and revive it!

We supply bottles of toner - a starter refill kit of tools in fact everything you need to make refilling empty cartridges a simple job. Ink Cartridge Refill Shop online Scottish Borders Hotel

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