Not suer this is the place for this thread as I am new to pc. I have a Dell optiplex GX520 this machine is dedicated to run a cnc router machine.It was pushed used about 6 month ago seam to work fine when I received it. Today when I tried to boot it up all i get is blinking lights. As the lite s are not labeled have no idea what most mean. light on the CD/DVD drive blinks amber along with the power button, the LAN indicator blinks amber,#1&2 diagnostic lights on not blinking, lights #4&5 blinking amber. HEELLPP where do I start. Thanks for the help . James