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Resetting the HP c6656a (No 56) - C8727 (No 27) blacks - c6657a (No 57) - C8728 colour & C6658 Photo ink cartridges:-
THREE METHODS ARE DESCRIBED BELOW
METHOD 1
1. Refill your ink cartridge using your Proprint supplied refill kit.
Now we explain how to reset the ink level gauge after refilling your HP 56 (c6656a) black and HP 57 (c6657a) color inkjet cartridges!
2. To reset the HP 56 black ink cartridge or HP 57 color ink cartridge, first tape over the contact pointed to by the arrow in the diagram on the left.
3. Install the 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 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 cartridge or the contact in the picture on the lower right for the color 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 cartridge is the top square on the last row from the left.
6. Install the cartridge into the printer 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 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.
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.
Green square = first contact to cover
Blue square = second contact to cover
Green square = first contact to cover
Pink square = second contact to cover
METHOD 2
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 cartridge and cover contact #2 with tape. Reinstall 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, youll 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, youll 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 with no cartridges in has no cartridge "To memorize" and that at the end of the procedure any cartridge introduced is treated as a "New cartridge" - No confirmation yet that this method is effective
