Philips model no 32ta2800 tv turn off after 5 to 10 minutes

SOURCE: Philips 32TA2800

The Way Im understanding your problem is,
it seems like you need to hook your rcas directly to the tv and switch the surround to aux or something similar to that.

SOURCE: iam having philips lct tv 32ta2800. the problem started with a whitish display while looking from sides then on the screen a small dash appeared with different colors even after turning off the tv the

If there is a USB reviever on the back or side of the TV you may need to try and update the firmware. Go to the manufactures web site search for your TV. You'll need to have the serial number and model number, which you can find on the back of the TV. Look for "equipment updates" then once you find it, download it to a usb and plug into your tv. There should be directions on their website. You could also call their technical support line, which can be found on the manufactures website.