Effective November 1, 2010, HP discontinued the HP LaserJet C4149A, C4150A, C4151A, C4152A, C4153A and CE256A print cartridges from its LaserJet supplies portfolio.
In November 2009 HP discontinued the following toners/packs for the printers
• C3909X HP LaserJet 5si and 8000 series printers
• 92298X HP LaserJet 4, 4m, 4 Plus, 4m Plus, 5, 5m, 5n and 5se printers
• C4127D HP LaserJet 4000 and 4050 series printers
• C9720AD HP Color LaserJet 4600 and 4650 series printers
In November 2007 HP discontinued the following toners/packs for the printers
• 92275A HP LaserJet IIIp, HP LaserJet IIp Plus, and HP LaserJet IIp series printers
• 92291A HP LaserJet IIIsi and HP LaserJet 4si series printers
• 92295A HP LaserJet IId, HP LaserJet III, HP LaserJet IIId, and HP LaserJet II series printers
• C3900A HP LaserJet 4V and HP LaserJet 4MV
Of course, compatible HP toners for the above are still available to keep your printer running! Some of the older HP printers just keep on keeping on and of course, some people have systems that will only print to the older HP Laserjet printers