Frequently Asked Questions

The box says 90A and my printer asks for CE390A — is this the right cartridge?

Yes — they are two names for one cartridge. CE390A is the full part number; 90A is the short series name HP prints on the printer's supply label. This cartridge carries both identifiers, so order by whichever name you have in front of you and you will receive the same unit.

What yield is this single cartridge rated at?

10,000 pages at standard coverage. This is the full-capacity version of the cartridge, not a starter unit: fitted into a LaserJet Enterprise 600 M601dn, it is rated to run from the first page to the last at the same consistent density.

How do I know my current cartridge is truly empty?

The signs arrive in order: the printer's low-toner message first, then visibly greying text. Lifting the cartridge out and rocking it gently from side to side levels the remaining toner and can carry a short job to completion, but once output fades again the cartridge has given what it has.

Does changing the cartridge take tools or a technician?

Neither. Open the top cover, slide the old unit out by its handle, remove the sealing tape from the new 90A, and slide it in until it seats. On the 600 series and on machines like the Enterprise M4555f the whole exchange takes about two minutes, mid-workday, without interrupting anything else.

Which printers does this cartridge serve?

The LaserJet Enterprise 600 M601, M602 and M603 printers and the M4555 multifunction series. If your machine's supply label reads CE390A or 90A, this is its cartridge — one part number covers that entire family of monochrome machines.

What warranty and returns apply to this cartridge?

A 1-year warranty and 1-year free returns: if the cartridge arrives damaged or fades far short of its 10,000-page rating, it is replaced or refunded. Help is available Monday through Friday, 9 AM to 5 PM CST.

About This HP 90A Cartridge

This single 90A (CE390A) cartridge, at $48.70, is the straightforward replacement for one monochrome machine that has just run dry — rated at 10,000 pages, sealed, and ready to fit the moment it lands. It is the unit offices reorder most: no stock planning, just the right cartridge for the Enterprise 600 and M4555 family. We ship from warehouses in IL, PA, GA and CA; the shipping & returns page sets out delivery and returns, and multi-packs for heavier use sit under HP.