Note that unless the cartridge is almost empty anyhow, it can usually be
revived by patting off the caked ink with a damp lint-free cloth and then
gently blowing in the vent hole on top until a drop of ink appears at the
print head. Sometimes this may have to be done more than once. NEVER poke
anything into that vent hole or you will have a mess!
|Printer and Photocopier Troubleshooting and Repair Collection : Cartridges drying out on early HP DeskJe..
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(From: Paul Weber (email@example.com).)
HP had a free upgrade kit for the 560 to solve this, maybe for the 500 as
well. It was a replacement for the silicone rubber park-position nozzle seal.
Also remember that the 500 came with a cartridge storage box with an elaborate
rubber seal in the bottom; they encouraged you to remove the cartridge from the
printer and put in the box whenever it wasn't in active use to prevent
dry-outs. Finally, HP cartridges have expiration dates - and they mean what
they say: If they're out dated, they work poorly or not at all.