How to refill the cartridge model is "818" and the printer is hp deskjet F4200

Refill or have someone refill ur current one.

here you can find instruction on video
for the black http://inkfilling.net/instructions-on-how-to-refill-hp-21-c9351a.html and for your colol cartridge 
http://inkfilling.net/instructions-on-how-to-refill-hp-22-c9352ae.html

hi
try cleaning th contacts of the black cartridge and the contacts of the black cartridge carrier with a wet towel 
if that is not working you need to replace black cartridge because the printhead of your cartridge has been overheat due air left in tha cartridge 
check here the right way for refilling
http://www.youtube.com/watch?v=dhDaKSzou50

If you mean the HP DeskJet F380 cartridges (the HP 21 and HP 22 cartridges) you will have unreliable success refilling these cartridges either yourself or online, at Costco, Office Max, and Walgreens. These refillers generally don't have fantastic quality control or knowledge of printer cartridges. I suggest Cartridge World or Office Depot refills. If you mean the HP Photosmart C8180 (the HP 02 cartridges) refilling them is easy but you need to replace the chip on the cartridge for it to work in your printer. As long as a refilled cartridge has a new chip it should work in your machine. Again I recommend Cartridge World or Office Depot refills.

i have injected 5 ml black ink in my 818 cartridge and inserted in my HP deskjetF2418 printer but it is not working and showing empty signal

why waint my hp deskjet f4280 after i have refilled the ink , it says the cartridges are not compatible

818 blake cartege Error problam not opret my cartege f4200

it depends
all small hp cartridge use second generation ink
and you can find a multi kit 
like this 
http://inkfilling.net/start-pack-a-hp.html
you can use it for all small Hp cartridges

you can simply refill the 818 cartridge first you take the cartridge and then you must clean outer surface of the cartridge with a cotton cloth then fill the ink with a cyringe before you put into the carriege holder you must clean the inside path of the carriege holder then put it it will work very fast and perfectly.

First Hole light cyan, scond hole cyan, third hole megenta, fourth hole yellow, fifth hole light megenta. now check. it will support Photo quality.