I recently added a 30A relay to power my inverter only when key is in ignition. I got the 12V Vacc line from my pioneer head unit and a switch so I can turn the inverter on and off if i need to reboot the PC.
Anyway after doing that I started getting these lines going through my NTSC LCD which is powered by cig lighter plug, I think it's some kind of noise coming from the relay. Before that it was working fine... what i do to get rid of it? i already have grounded the computer. please help guys.