LCD loads of electronic Noise (humming on immage with M4- ATX)
Hi. my current system uses 2 LCDs. one small, powered from the pc PSU,
and one 15,6 " wich is powered by an inverter .
up untill now, i was powering the pc with an inverter--> and then normal house PSU. this had resulted in loads of noise in the screen. but only the big one. the small works perfect. i got by it, by cutting the "ground/yellow" cable from thecable that connected the psu with the inverter.
But now, i have bought a M4 atx power supply. and i jut cant figure how to get read of the noise in the screen. i also use an amplifier, and an external usb sound card. they also had noise, but ground loop isolators solved it.
i have tried diferent gound points, and no, the signal cables are not on the same side with the power and bla bla..
i am thinking that maybe it's the alternators fault, cause, when i rev up, there seems to be some difference in the haming of the screen (but small). i also know, from a readings i did to a car sensor, that (on that sensor) there was an AC current of 0,1 v that went to 0.2 the more i reved...
i', thinking that maybe , cutting the ground wire from the inverter-->LCD would work, but i dont wanna risk using the lcd without ground.
Also, the PSU/AMP are grounded to the chasis atm, and the lcd inverter is grounded elsewhere, at the battery. (although, grounding it on the same ground when i had the 2 inverters hadent solve anything...) the lcd is connected with 5 meter vga cable...
this is prety much a shot in the dark, so any advice would be helpfull!