Ive a sony stereo as soon as i turn it on it turns it self back off?

Check the speaker wiring on the back to see if any are shorting, if okay! the problem is in one or two audio output ic's.

You PUSH the POWER control (OFF) because it is self protecting.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or
marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is
running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

open the controller and use rubbing alcohol and qtips to clean the control. if you arent good at it, have someone else do it

check your ground or better yet run a new ground wire and make sure you attach it to something solid like a steel bracket

My audio in wont work when connected to my note note book pc,it worked fine about 2mons ago, ive even switched audio in cords and still nothing. Both my music on my pc and stereo wok seperatly but wont when connected HELP!!!

ive gotten my phone to get checked out by centers and whatnot and its still having the same problem
what else can this be ?

possible has bad switch block .ive used alamocamera.com twice and very happy with the service..their website is www.alamocamera.com

Sounds like you have the ground for the radio hooked up to the illumination ground wire. Check for orange or orange/black wire coming from the radio harness. Did you buy the harness for the car as well? If so then just match all the colors of wires from the car harness and the radio harness. By car harness I mean the harness that plugs into the harness that the original factory radio plugged in to.

Thanks

Your audio output IC is shorted.Time for the repair shop.
barneyluc

If you used a wire harness to connect with the factory setup, try running the power wire to your fusebox. Find a fuse that is only live when the car is running and insert the wire with the fuse.