Printing from 2 differant computers.

49.XXXXX ERROR
A critical firmware error has occurred.
1. Turn the device off and then on.
2. Try to determine whether the error occurs intermittently, while printing, or when turning on the device.
3. If the error appears while printing, determine whether it occurs when printing from a specific computer, a specific application, or a specific file. If all other computers, applications, or files
can print without the error, then the problem may be only within one print job or computer. Make sure the computer has the most current printer drivers, or use a generic printer driver.
4. Go to www.hp.com/support/LJP3005. Click Download Drivers and Software. Check for the latest firmware image version at the bottom of the page. If this firmware image is newer than the
one installed on the device and the device can receive a firmware update, download the newer firmware upgrade.
Try printing a job from a different software program. If the job prints, go back to the first program and try printing a different file. If the message appears only with a certain software program or print job, contact the software vendor for assistance.
6. If the message persists, contact your HP Support.

The Print Diagnostic Utility diagnoses and resolves common printing problems and communication problems, including:

If you prefer, you can skip this information and go directly to downloading the tool .

• Connectivity :
  • USB: Ensures that the USB connection from your computer to the HP product is working correctly.
  • Network: Ensures that the network connection between your computer and your network is working correctly. If the tool detects a network connectivity problem, you will be prompted to run the HP Network Diagnostic Utility for better results.
• Spooler : Automatically restarts the print spooler, which sends print jobs from the computer to the product, if it has been stopped.
• Online status : Checks if the product has been paused or set to offline, and then sets the status back to online if necessary.
• Device manager : Checks for problems in Device Manager that would prevent printing.
• Print queue : Checks for and clears pending print jobs in the print queue (a log of print jobs waiting to print).
• Port : Checks the port settings for the HP product.
• Driver : Checks for alternate-driver settings.
• Conflicts : Checks for conflicts with other drivers, such as other printer brands.
• Default printer : Checks the default printer setting and prompts to select the HP product as default (optional).

The Print Diagnostic Utility diagnoses and resolves common printing problems and communication problems, including:

If you prefer, you can skip this information and go directly to downloading the tool .

• Connectivity :
  • USB: Ensures that the USB connection from your computer to the HP product is working correctly.
  • Network: Ensures that the network connection between your computer and your network is working correctly. If the tool detects a network connectivity problem, you will be prompted to run the HP Network Diagnostic Utility for better results.
• Spooler : Automatically restarts the print spooler, which sends print jobs from the computer to the product, if it has been stopped.
• Online status : Checks if the product has been paused or set to offline, and then sets the status back to online if necessary.
• Device manager : Checks for problems in Device Manager that would prevent printing.
• Print queue : Checks for and clears pending print jobs in the print queue (a log of print jobs waiting to print).
• Port : Checks the port settings for the HP product.
• Driver : Checks for alternate-driver settings.
• Conflicts : Checks for conflicts with other drivers, such as other printer brands.
• Default printer : Checks the default printer setting and prompts to select the HP product as default (optional).

Not all USB adapters are the same, you need the one that is made for your printer, I would try a different adapter before going too deep, because when you plug it in your computer should see it even without drivers.

Check the way your print Jobs Spool up in your PC. you may have a totally different set up for printing in your new computer that takes two or three extra steps(such as spooling the print job) prior to actually sending it to the printer to be printed. If you have a user manual for your new computer, check the printer set up and see if it is set up to print directly to printer or print to spooling folder then to printer. Also try a different driver if you wish, I know the 2430 can use either PCL5 or PCL6 drivers... I'd start there and see if there is a difference.... the problem isn't your printer obviously its the way your computer is communicating to it. Best of luck to you.
Faxgenius.

You might be printing in a different mode...you can see it in the printing preferences tab(fastdraft, fastnormal, normal and best quality )... or are you directly connected to the printer? or in a LAN? try using a different usb port...

Have you tried a different port?
This will identify if it is a USB issue, possible USB 1 or 2.
It sounds like an issue with your port and not the printer, do you have access to advanced settings on your computer for USB?

reistallation of printer

Prints red only including direct from printer -no computer linkage that right? or vis the computer. If it is the first situation then pack it up take it back. If it prints OK on its own but off via the computer -come back

I think that quality settings is different for each user. If your printer have network card, pleas install printer with TCP/IP port in every PC, not from server, more job, but less problems.