Quick Triage & Baseline
The Symptom: One specific colour (Cyan, Magenta, Yellow, or Black) is completely absent from the print, skewing the overall hue.
Immediate Branch Logic:
Do not start buying parts. You must run a diagnostic test page first to determine if this is isolated to one colour channel or affects the entire carriage movement.
⚠ STOP LINE: Do not run more than 3 consecutive printhead cleaning cycles without printing a test page. You will flood the waste ink pad and lock the printer permanently.
Fast Resolution Checklist
Perform these immediate actions (30-60 seconds) before escalating to a hardware repair.
- Step 1: Print a CMYK Test Page immediately
- Step 2: Identify exactly which channel is missing
- Step 3: Check if tape was fully peeled off new cartridge
- Step 4: Run built-in Printhead Clean routine (max 2 times)
- Step 5: Leave printer ON so it completes maintenance sweeps
Likely Causes
1. Empty colour cartridge. 2. Completely clogged printhead nozzle. 3. Tape/seal not removed from a new cartridge.
The Physical Mechanism
The specific microscopic channels inside the printhead responsible for that colour channel are physically blocked by dried ink, or the supply reservoir is dry.
Decision Rule (If X, Then Y)
If a CMYK test shows a perfectly blank cyan block, the cyan channel is blocked. Run 2 cleaning cycles. If no improvement, the head is severely clogged.
Common Wrong Assumptions
Assuming a driver issue. Drivers send RGB data; if only Cyan is missing physically, it is a hardware ink delivery failure.
Limits & Escalation
Stop attempting DIY repair if the defect persists after fresh consumables, 3 cleaning cycles, and a driver reset. You are now looking at a failed Logic Board, Fuser, or permanent Printhead block. Consult your brand’s support path.
Prevention & Early Warning
Never leave an inkjet printer turned off for months. Print a colour page at least once every two weeks to keep fluid moving.