NEWBIE K8062 DMX led flashing in TEST mode

Hi, I’ve been given this kit but I can’t get it working - help please!
It’s already assembled and looks OK but I’m not getting any output - the lights aren’t coming on!
The R9 component is not fitted, as per the instructions.
When I attached a 9V battery and press the test button, the red power light comes on and the red DMX light blinks 3 times. Then it starts flashing at a faster rate, without anymore presses on the button.
If I cancel the test and plug in the USB cable, the red power light comes on and the red DMX light blinks 3 times and then goes out.
The board is marked Velleman 2004 & P8062-1.
I’m no electronics expert but I would really like to get this going, if possible. Any suggestions most welcome. Thank you

When you use this kit with usb, you can’t use the battery.
Battery is only use in test mode.