Samsung 6050 - Manual (Page 21)

Setting Up Your Printer 2-7
4. As the printer powers up, all operator panel lights turn on briefly.
When only the READY light is steadily on, press and hold the
operator panel button until all lights are blinking (approximately
four seconds), then release the button. A test page should print out.
If this does not happen, re-check the installation.
The test page lists your printer model and default settings along
with the data streams available for your printer model.
ERROR
MANUAL
PAPER
READY