HP 51A Black Toner Original Laserjet (Q7551A)

The HP 51A black toner cartridge is the genuine Original HP replacement, part number Q7551A, for the HP LaserJet P3005 series and the M3027 and M3035 all-in-ones. These were fast, robust business machines and many are still in daily service.

Compatible printers

• HP LaserJet P3005 Printer
• HP LaserJet P3005d Printer
• HP LaserJet P3005dn Printer
• HP LaserJet P3005n Printer
• HP LaserJet P3005x Printer
• HP LaserJet M3027 MFP
• HP LaserJet M3027x MFP
• HP LaserJet M3035 MFP
• HP LaserJet M3035xs MFP

If your model isn't listed, send us the number from the front of the machine and we'll confirm before you pay.

Specifications

Genuine or compatible?

Genuine, Original HP in the sealed box. Not a refill and not our Royal house brand, which is always sold under the Royal name. HP has discontinued this cartridge, which matters when you are buying: remaining genuine stock is finite, and the gap gets filled by remanufactured and counterfeit product. The signs of a fake are grey rather than black text, poor fusing and toner escaping into the machine. On a printer that has already given you years of service, that is a poor trade. Ask us and we will tell you honestly what we hold.

Why buy from Trinatech

• Departmental-class stock held in the Nairobi CBD rather than ordered in on request.
• Countrywide courier delivery, Nakuru, Eldoret, Kisumu and Mombasa included.
• M-Pesa or bank transfer, with proper invoicing and LPO handling for corporate accounts.
• WhatsApp us the model number, or visit The One Mall on River Road.

Getting the most from this cartridge

• Rock the cartridge gently side to side before fitting and remove the sealing strip completely.
• When print goes faint, take it out and rock it again before ordering. On these older designs that reliably buys another fifty pages or so.
• Store spares flat and boxed, away from heat and damp. Toner clumps in humidity and clumped toner streaks down the page.
• 6,500 pages assumes 5% coverage. Forms, invoices with heavy rules and dark headers will come in under that.

Frequently asked questions

• Is there a higher-yield version? Yes, HP 51X (Q7551X) fits the same printers and prints around 13,000 pages, double the 51A.
• Do I need a separate drum? No. The drum is built into the cartridge, so both are replaced together.
• How fast is delivery? Same day within Nairobi, next working day to most towns.
• Can I return it? Yes, sealed and unused.
• My printer is well over a decade old. Is it still worth buying toner for? Usually yes. These machines were built to last and a cartridge costs a fraction of a replacement printer. If the drum or fuser is failing, we will tell you rather than sell you toner that will not fix it.