Hi all ,
I've designed a tester , the product has got a connector which is supposed to be connected to the tester's connector
The tester has got a 7Inch TFT
Sometimes , whenever I connect the connectors , the TFT screen disappears as if there is no backlight .
I think the problem lies on Ground .
How could I connect 2 Grounds ("Tester Ground & Product Ground" or "Tester Ground & PC Ground") while there is no earth in common ?
I think having a large ground somewhat would solve the problem but isn't there any other way ?
Thanks in advanced