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are they not printing at all or are the cartridges flashing inside the printer. is it refilled

it is not just a case of making a hole to pore in toner you need to empty the waste also. make a hole by the arrow on the top of the cartridge and vacume out old toner. rotate drum to make sure drum is not sticking or blade has not flipped. make a hole underneath the cartridge where the...

ive seen this quite a few times. normally it is down to your windows not been up to date. so run a full windows update to the latest service pack and hopefully it will install. make sure you remove all hp driver software before update and restart computer also

hey before you follow the info from the other guys and waste money. remove the printhead and soak it in warm sterile water for approx 3 hrs. evert 30mins place it on the end of a vac cleaner for 5 seconds repeat this for 3 hrs. when finished dry printhead with tissue and place in printer and...

it is an electrical fault on the pcr/ developer roller easy to solve