Question 1

Are the cartridges included or do you have to buy them?

Accepted Answer

This is the third such unit I have purchased. i bought this for my boss. The cartridges that come with the unit will get you a few months of medium-level printing. After the first of these, when i buy one, I buy a full-set of replacement cartridges on the original order.

Question 2

Does this printer have a manual feed to allow printing of envelopes?

Accepted Answer

Yes. The pull down tray (the pull down slot that you see in the picture) allows for you to manually feed envelopes.

Question 3

Compatible with Mac computers?

Accepted Answer

Hi Cathy - I have a Mac Book Pro running Yosemite now . 
I was able to install the printer in Maverick and also in Yosemite as a shared TCP/ IP printer.

I have PC, MAC and Linux clients printing on the same device

Question 4

Does this come with 4 cartridges of toner?

Accepted Answer

Yes, but I believe the cartridges they ship with are slightly lower capacity than ones you buy separately.

Question 5

can this printer scan?

Accepted Answer

No, this printer is just a printer, not a multi-function device.

Question 6

Can/Should I purchase ink cartridges from you simultaneously?

Accepted Answer

We bought this printer and four cartridges(one each color) along with.  Spend a little extra for the higher capacity cartridges.  We got this back in August and are just now having to replace the black.  We are not heavy users, I just wanted a nice color laser.  I would say buy the replacement cartridges now(better to have and not need than to need and not have) so you won't be blindsided when you need them.  Hope this helps.

Question 7

Can this printer handle card Stock?

Accepted Answer

Depends on the weight of your card stock. I have ran what I call thin card stock suitable for signage without any problems. The stock I ran was about four times the thickness of standard copy paper.  Sorry I do not know the weight of the card stock. You may want to check the HP web page for the paper specs for this printer. Hope this helps.

Question 8

Does this printer print wirelessly from a laptop?

Accepted Answer

The "dn" does not have the wireless piece built in.  It says that you can buy it later, but I found that the HP version from over $100 so if you need wireless, get the "dw" version which is roughly $50 more (not including sale pricing).

Was concerned getting the non-wireless one, but I plugged it into my home network directly and works great.

Question 9

I see that this printer works with Mac 10.5, 10.6. Will it also work with Mac 10.7?

Accepted Answer

YES, it works with all the latest mac os versions. You may need to download the HP Printer support package from apple's website (a few hundred MB, contains all HP print drivers)

Question 10

Is this a refurbished unit?

Accepted Answer

No this was NEW. I love it ! ! It is fast and the ink last a long time.
I would go for NEW if I were you.

Brand	HP
Series	LaserJet Pro 400
Model	M451dn
Part Number	CE957A
Recommended Use	Workgroup
Display	2-line LCD (text)

Output Type	Color
Laser Technology	Laser
Black Print Speed	Up to 21 ppm
Black Print Quality	600 x 600 dpi
Time To First Page (seconds)	Black: As fast as 17 sec Color: As fast as 17 sec
Print Languages, std.	HP PCL 6, HP PCL 5c, HP postscript level 3 emulation
Duplex printing	Automatic
Max. Duty Cycle	Duty cycle (monthly, A4): Up to 40,000 pages Recommended monthly page volume: 750 to 2,000 Pages

Paper Trays, std.	2
Paper Trays, max.	3
Input Capacity, std.	50 pages multipurpose tray 250 pages input tray 2
Output Capacity, std.	150 pages
Media Type	Paper (bond, brochure, colored, glossy, letterhead, photo, plain, preprinted, prepunched, recycled, rough), postcards, transparencies, labels, envelopes
Media sizes supported	Media sizes supported: Tray 1: Letter, legal, executive, 8.50" x 13.00", 3.00" x 5.00", 4.00" x 6.00", 5.00" x 8.00", envelopes (No 10, Monarch) Tray 2, optional Tray 3: Letter, legal, executive, 8.50" x 13.00", 4.00" x 6.00", 5.00" x 8.00", envelopes (No 10, Monarch) Automatic duplexer: Letter, legal, executive, 8.50" x 13.00" Media sizes, custom: Tray 1: 3.00" x 5.00" to 8.50" x 14.00" Tray 2, optional Tray 3: 3.94" x 5.83" to 8.50" x 14.00" Media weight, supported: Tray 1: 16.00 to 47.00 lbs. (up to 58.00 lbs. with HP Color laser glossy photo papers) Tray 2, optional Tray 3: 16.00 to 43.00 lbs. (up to 47.00 lbs. with postcards, up to 58.00 lbs. with HP Color laser glossy photo papers) Automatic duplexer: 16.00 to 43.00 lbs.

USB Ports	1 Hi-Speed USB 2.0 port
Network Ports	Ethernet 10/100BaseTX (RJ-45)
Connectivity Technology	Ethernet (RJ-45) / USB

Noise Level (Approx.)	Acoustic power emissions (ready): 4.1 dB(A) Acoustic pressure emissions bystander (active, printing): 51 dB(A)
Processor(MHz)	600
Memory, std.	128 MB
Memory, max.	384 MB
Power Requirements	110 to 127 VAC (+/- 10%), 60 Hz (+/- 3 Hz)
Power Consumption	425 watts (Active) 15.2 watts (Ready) 4.0 watts (Sleep) 0.5 watt (Off)

HP LaserJet Pro 400 M451dn (CE957A) Duplex Up to 21 ppm 600 x 600 dpi Workgroup Color Laser Printer

Learn more about the HP M451dn

Customer Reviews of the HP M451dn

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Windows Compatible	Full software installs supported on: Microsoft Windows 7 32-bit and 64-bit, Windows Vista 32-bit and 64-bit, Windows XP 32-bit (SP2 or higher); Driver only installs supported on: Microsoft Windows Server 2008 32-bit and 64-bit, Windows Server 2003 32-bit (SP3 or higher)
Macintosh Compatible	Mac OS X v 10.5, v 10.6, v 10.7
Other	Linpus Linux (9.4, 9.5), Red Hat Enterprise Linux (5.0, 6.0), OpenSUSE Linux (11.3, 11.4), Fedora (14, 15), Ubuntu (10.04, 10.10, 11.04), Debian (5.0, 6.0 and HPUX11i)

Dimensions	12.70" x 15.90" x 19.10" Max: 12.70" x 15.90" x 27.10"
Weight	52.10 lbs.

Item#: N82E16828415243