Have a Konica Minolta 2430 DL and it ask me to install blk toner after install toner it has error line 2408. can you help me?

maybe you have more than one color empty

Clean toner chip reader, remove OPC drum and all toners, under the toner rack there is a 3 pin chip reader, use pressure air to clean it.

Clean toner chip reader, remove OPC drum and all toners, under the toner rack there is a 3 pin chip reader, use pressure air to clean it.

remove PC drum and under that you can see laser glass, clean it and reinstall.

2408 means that the toner cartridge you are trying to rotate to is already in the top position or you need to install another toner cartridge before you can rotate to the color you want to replace.

To fix the toner not installed message clean the three contacts on green chip on the right side of the toner cartridge. You may see black lines on them. Use an eraser or rubbing alcohol.

i have the same problem. my printer says all of the toner cartridges are not installed. i have taken each one out and returned them, and have rebooted the printer multiple times. nothing helps.

Check the toner contacts in the printer, you may find one either dirty , bent or broken.

here are the instructions:
http://onlinehelp.kmprinters.com/CPDocs/q0904029.htm#magicolor%202430%20DL

Under Quality Tab you have the option for B/W printing.

toner chip is gone replace cartrige