LaserJet CP4005
The LaserJet CP4005 is a mid-2000s color single-function printer built for everyday office documents, and its cartridge story is refreshingly simple: one HP 642A set of four — CB400A black, CB401A cyan, CB402A yellow and the CB403A magenta stocked on this page. Each color lives in its own cartridge, so the CP4005 tracks and replaces them one at a time.
Ask around about this generation of LaserJet and you hear the same story: bought for routine office printing, then simply kept — years of letters, invoices and reports with minimal fuss. A printer with that kind of service record does not ask for much; it asks for the right cartridge when a color runs low. For the magenta slot, that cartridge is the CB403A listed here, and the printer's own supplies readout will tell you when its turn has come.
Toner Cartridges for LaserJet CP4005
| Cartridge | Color | Page Yield |
|---|---|---|
| CB403A | Magenta | See product page |
Which cartridge should you buy?
Work by color, not by calendar. The CP4005 monitors each of its four cartridges separately, so the only question is which one the printer is flagging: if it is magenta, the compatible CB403A on this page is your buy. The black, cyan and yellow cartridges are members of the same 642A set but are not listed on this page, and none of them can substitute for the magenta slot. Buying the flagged color only — instead of a whole set — is where a four-cartridge machine saves you money, and this cartridge is backed by a 1-year warranty and 1-year returns.
Chip, toner and everyday use
Every 642A cartridge carries a chip the printer reads for its level estimate, and the CP4005 reports the four colors independently — a low-magenta message is never a reason to touch the other three. Fit the new cartridge with its sealing tape fully removed and press it home until it seats; the printer then runs a short calibration. If magenta starts to fade while the gauge still shows toner left, lift the cartridge out and rock it gently end to end to level the toner, then print on until the color truly gives out.
Frequently Asked Questions
What do the four cartridge codes mean on the LaserJet CP4005?
Each code is one color of the HP 642A set: CB400A is black, CB401A cyan, CB402A yellow and CB403A magenta. Order the exact code of the color that has run out — this page stocks the magenta CB403A.
Can I replace just one cartridge when the others are still full?
Yes. The cartridges are independent and separately tracked, so you swap only the empty one and leave the rest in the printer until their own turn comes.
Will compatible cartridges work in the LaserJet CP4005?
Yes — a compatible cartridge built for the 642A family, like the CB403A here, installs the same way as the original and is recognized color by color, just as the genuine cartridge is.
More printers that use the same cartridges
The 642A set is shared with these sibling models and the family code page:
Color LaserJet CP4005, Color LaserJet CP4005DN, Color LaserJet CP4005N, HP 642A, LaserJet CP4005dn, LaserJet CP4005n