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Is your HP Photosmart C309g's printhead clogged, producing streaky output or not printing a certain color? This guide will show you how to unclog the printhead on this printer.
If your HP C309g has a clogged printhead, this guide will help potentially resolve the problem and get the printer working again without another $80 printhead to fix the problem when you can fix it with materials you have at home. The steps to clear the printer out can be used interchangeably with other semi permanent printhead type printers. While the cleaning steps will easily carry over, you can't carry the disassembly steps and printhead bypass over. These are specific to the HP C309g. Your best bet for other brands of printer is to look online for the procedure on how to remove the printhead.
Here is the one thing I would like to clear up now: The steps to clear the printhead I used here will work on all Inkjet printers, and even fully integrated cartridges but '''ANY AND ALL DISASSEMBLY STEPS GO TO THE HP PHOTOSMART SERIES WITH 564 INK!''' If you use this guide to clean a non HP printer or a HP printer that does not use 564/920 ink, you are going to have to adapt the disassembly level/head removal to your printer, which you can probably find out how to on YouTube, or tinkering with the printer. '''If you are stupid enough to use these steps to work on a NON HP printer, or one that doesn't use the 564/920 cartridge and break the machine, I don't want to hear it-it's on you.''' Got it? Good.
For HP ePrint enabled printer owners: The method for printhead removal should be the same on Web Connected 564 printers too, but double check the mechanism to be sure. The only other thing to note is older cartridges will not work on web connected printers-you '''must''' use updated cartridges since the programming on the chips is different and the firmware blocks out older cartridges. You actually can transfer the 564SETUP chips to bypass this, but you do this at the risk of the warranty, since you are technically modifying the ink cartridge if you have known good, previous generation HP ink. I should also warn chip transfer ''can be'' extremely difficult the first time it's attempted too, since the likelihood of busting the chip is high if you have never done it due to the sunk in design HP uses for these inks to prevent chip removal. Use cartridges you don't care about to practice.
Here is some more information on [|compatibility with newer printers] and [|identifying old generation ink cartridges] to refer to. If the cartridges do not match what HP says to identify new generation cartridges, it will not work in the e-print printers.
Note on HP 920 printers: HP no longer makes printers with the 920 cartridge, but this guide will be useful to people with these printers who have them. The bypass for the printhead initialization doesn't apply to you guys, though. Also, as the author and being I wrote this back in 2010 and just started to clean this guide up I don't want a HP 920 printer either. If you guys can get one be my guest to do one for this ink series. And yes, the removal method should be the same, too. The only thing with this is don't reuse these pictures. These are for the C309g. If you guys want to bypass the printhead setup on these, you'll have to find the method because I have no plans on getting one.
You can try and bypass the initialization of the printhead on a modern Web Connected printer, but I will not guarantee the outcome for these printers. I only guarantee this method on the Photosmart c309g and '''some''' similarly aged printers with the 564 cartridge since I know it to work on printers from this era for sure. HP's Web Connected printers may have protections in place to prevent this, even if bypassed correctly. You can certainly try, but it may not work since HP updates the firmware on these printers on a somewhat regular basis. The other problem is if you use the Web Apps on them, you will likely be forced to accept these updates. '''If the ink purge bypass is not done EXACTLY as written, it will not work!'''
I would also like to mention as the original author this will '''not''' unclog every case of clogged printheads. If this doesn't work and the ink is confirmed good the printhead is damaged. You will need to replace the printhead.
'''HP Photosmart Premium ePrint owners: You can carry both the disassembly and cleaning instructions over, but since I have not verified the initialization bypass on a ePrint ready model I cannot promise the bypass will work. You're certainly welcome to try, but it may not work on these models.'''
Clearing a printhead clog in a HP Photosmart C309g.