HP LaserJet Pro M375/M475 — Install color cartridge
The printer believes a required color cartridge is missing even though the cartridge door is closed.
Error meaning
A required color cartridge is missing while the door is closed.
This meaning is tied to the reviewed family/platform and subsystem below; do not reuse the number or wording by itself on a different printer family or protocol.
Applies to
LaserJet Pro 300/400 color MFP M375/M475 Series
- HP LaserJet Pro 300 color MFP M375
- HP LaserJet Pro 400 color MFP M475
Common formatting
These are formatting/lookup aliases for this reviewed condition, not separate error pages.
- Install [color] cartridge
- install-cartridge
What usually causes it
- The indicated cartridge is actually absent.
- The cartridge is present but not fully seated in its slot.
- The wrong cartridge or a damaged supply prevents the printer from detecting that color position.
What to try
Use the message to identify the missing color
Check only the color named on the display first.
Install or firmly reseat that cartridge
Align it with the correct slot and push it fully into place without forcing it.
Verify the part number and cartridge condition
A physically similar but wrong supply may not be recognized as installed.
Close the cartridge door completely and wait
Let the printer complete its supply check before deciding the message remains.
After each corrective action
Retry the same operation that produced Install [color] cartridge. If it now works, stop there rather than changing unrelated printer, network, supply, or service settings.
If the code returns
If Install cartridge returns with a correct cartridge fully seated, test a known-good supply if available and note whether the failure stays with the cartridge or the printer slot.
When service may be needed
User troubleshooting should stop at correct installation and supply replacement. Persistent detection failure in one slot may need HP service.
Continue with guided troubleshooting
If the printer still is not working after the reviewed checks, carry this verified error context into the guided troubleshooter.
Related information
Verified source
Official HP family support document explicitly covers M375/M475 and provides supply and 79-series control-panel meanings/actions. Color variants are reviewed as variants, not separate SEO opportunities.