The printer just sits there and flashes from orange and green lites alternating once you print or do an internal print. Once it prints it will not print again. I changed out the drum with another (which included the toner) just to make sure it wasn't out of toner.
This is made by Samsung for Dell, and the light code indicates a supplies error. If you download the driver and connect to a computer the "remote op panel" should give you the exact error message. I would suspect it is in low toner condition, once the machine sets this flag a new toner cartridge must be installed to reset the code. With some models this was a 1/16t amp (0.63mA)fuse on the toner ctg which was easily replaced, and you could fool the machine into reseting the toner usage counter; the newer cartridges use a chip and we have had several new toners with DOA chips.