@PhotonPhil said in Blue Flashing D4 LED:
So... on further testing: putting 12v across the main wires into the laser will make it fire but I notice the "dot" when focused isnt actually a dot... its a small line?? Is this an issue?
When I put 12v down the cable to the laser without connecting the pin noted VCC it gives a red led or flashing red led if the low light button is pressed.
I am assuming that this means it is the board itself that is faulty... would anyone like to confirm this for me please?
nope, if you get a small line instead of dot , it means you didnt focus the laser moudle , you need turn the knob which is in front of the laser module and meanwhile turn on the weak light button on the laser module .
until you get a dot . Done