Black, Yellow, Cyan, and Magenta Supplies Status gauges
A ? appears instead of the consumption level when the level is not known. This can occur in the following circumstances:
|●||Incorrectly placed cartridges|
|●||Cartridges with an error|
|●||Some non-HP cartridges|
The supplies gauge appears whenever the printer shows the Ready state with no warnings. It will also appear when the printer shows a warning or error message concerning a print cartridge or multiple supplies. If a supply is empty, the gauge will flash.