The first thing that you should do when bringing a printer back out from storage is to PHYSICALLY check the ink levels. (Any notion of saving ink from a purge cycle is strictly a bad idea. You stored it , and this is what needs to be done in restarting. This is a reasonable requirement.) Remove the cartridges and check the ink level with your eyes. If it was stored in a place of low humidity and temperature and/or atmospheric fluctuations you will experience accelerated ink drying from the sponge.
This will result in a REAL physical ink level or volume that is much lower than what the ink monitors indicate. Perhaps totally empty.
BTW, ink monitors do not really monitor ink at all. So you cannot depend on that on a reliable basis. Second thing is the ink low prism circuitry and related warning will NOT work when the ink levels/ countdown readings are higher than a certain level. So complete trust in that system after unusual events should not be taken as failsafe. The circuitry is turned OFF when the chip reads high. The chips on cartridges are simply digital countdown circuitry. There are no sensors of any type. You should NOT expect a sensor circuit accurate to within a mil or so to be included in an item that retails for less than $20.
Final thing, NEVER store printers that use cartridges open to the atmosphere ( like the Canon sponge ones) with cartridges near empty or very low. If stored too long and the sponge dries to a certain level, the sponge will start exhibiting a strong negative pressure and will pull the ink back from the printhead and towards the cartridge. In unfortunate circumstances, ink left or separated in the nozzle in this state could eventually dry and cause a real clog because it would have been cut off from the hydration of the ink left in the cartridge,
