HU high pitch whine

[csu87 10+ year member]

I have a Jensen in dash touchsreen dvd and nav system in my car. its the kind with the screen that flips out. When the screen is out and on, there is a high pitch noise that gets louder as the engine revs. the sound is coming from the speakers. when the screen is in, there is no noise.

anyone know what could be causing this?

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[Louisiana_CRX 5,000+ posts]

bad ground or burnt pico fuse

 

[alerotdx 10+ year member]

bad ground or burnt pico fuse

x2

 

[csu87 10+ year member]

bad ground or burnt pico fuse

That's what I had originally thought but wouldn't that make the noise all the time and not just when the screen is on? I also have it so that I can watch movies while the car is moving; the parking brake wire is connected to the ground. Could that be what's making the noise?