Why does the volume go all the way up, even if it was down, when car is started?

Hello there!
Sometimes High pitching its just that, static on the area, like if you are near a microwave, or near other electronic equipments, but, if the skreetching sound keep going or even if you do nothing it could be a line inside the sound card, or you need to clean the volume botton with special electrical cleaner. other that these, its contacts, or bad cap for the volume board inside.
Good Luck!
Carl

Very simple. It is not a defective unit. Simply a matter of volume attenuation, hold the "function" and "grove"keys for aprox 5 seconds until a message saying vac off appears. Problem solved. Resets itself eveytime the unit is turned off .
enjoy!!!

Have you owned this car since new? If not, when did you buy it and in what condition?

replace the main control board- might not be worth it tho, sounds like the brain is failing- more like a chip or capacitors on the main board, check for bulging capacitors and other bad visible parts

speaks are hooked up wrong or speakers are blowin.

try reducing the output volume from the pc, maybe to about half or even a quarter of full volume. now increase the volume on speakers.

Hi,

Some dust in the button to lower the volume on your TV or on your remote control might be causing it to think it's being pressed. Try playing around with it, pressing it hard so as to relieve it of any pressure on the inside.

Do you have the amp bridged first off? if you do unbridge it. Next,

1) Turn all the settings all the way down on the amp.
2) Turn your bass on the radio into the negatives (-2 or-3)
3) Turn the volume up to the point where your highs start to not sound good, then turn them down just enough to where they sound good again.
4) Turn your crossover to about half if your box is ported, or three Fiths if its sealed.
5) Raise your gain slowly untill either the volume doesn't get any higher or you hear the subs start to sound funny. Now turn it down just a hair.
6) Turn your crossover up a hair then down a hair and see what happens, if it gets a touch louder with out distortion then leave it. If it losses clarity then place it back to where it was.
7) Listen to a couple songs you know well and stand in front of your subs at volume to be sure theres no distortion.

You should be good at this point let me know if you need something else.

starting from amp,what is the rca connected directly to. headunit or adoption?