vin2install 0 Posted January 27, 2009 What is the cause of black horizontal lines going from the bottom to the top. This isn't the power supply as a new exact same model camera plugged in at the same place using the same source of power wont have these horizontal scrolling black bars. I'm thinking it might be because of the power draw of the LED's. Does anyone know what causes this? Share this post Link to post Share on other sites
Erron S. 0 Posted January 28, 2009 A thick bar that slowly scrolls from the bottom to the top? That's a "hum bar" which is caused by a ground loop. Erron S. Share this post Link to post Share on other sites
vin2install 0 Posted January 28, 2009 So is the ground loop in the camera? And why does it do it when the IR's are on only? Share this post Link to post Share on other sites
mr.surveillance 0 Posted January 28, 2009 If this is a 12vdc camera try a larger power supply (higher current rating) and be sure its regulated. Share this post Link to post Share on other sites
vin2install 0 Posted January 28, 2009 I'm just wondering is it after a period of time does the camera start drawing more current? Share this post Link to post Share on other sites
