pen is not working without charge cord
Hello I recently acquired an HUION KAMVAS GT-221 pro, I received a pair of pens, I have tried to use both pens on the display after installed the drivers, and they (the pens) did not work. if i leave the pens connected, both pens works with wire normally. I tried to charge both, the indicators on both pens keep on white color and do not work without charge cable.
what should i do?