Daewoo dts 42 turn on and power goes back off

Check for a bad fuse inside the receiver.

Try resetting the receiver by unplugging it for a minute, then plug back in. Here is a link to the Marantz support website:
http://marantz.custhelp.com/app/answers/detail/a_id/99/session/L3RpbWUvMTQzMDc1MzA5Mi9zaWQvdkM1aWd2bG0%3D

You will find all the fuses under the back seat driver side.

DTS should be enabled only if your source has a DTS digital audio out connected to the receiver.Mostly only DVD / Bluray players have DTS sound and is outputted through an optical or co-axial port on the back of the player. Its a multichannel digital encryption technology where the signal is sent through one cable and your receiver decodes it into 5.1 or 7.1 channels according to the source.

Optical connections will only carry compressed Dolby Digital 5.1, compressed DTS 5.1, and uncompressed PCM 2.0 (stereo).

But your Blu-ray player should have an audio output setting so that master quality soundtracks on Blu-ray (Dolby TrueHD, DTS-MA, PCM 7.1) can be downmixed to DD 5.1 or DTS 5.1.

That way the optical cable will be able to get a usable audio format, regardless of what format of audio you choose from the disc (some Blu-rays do not technically have the older audio formats, they rely on the player to play the backward compatible version that is embedded within the master audio track).

Where did you connect the Video too?, are you using RCA, S video?

DTC P1507 - Idle Speed Actuator (Close) Open

That code plus the low idle is usually caused by a sticking IAC (idle air control) valve. The valve is located on the intake manifold. In order to solve it, will need replace this.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

there are a few versions of DTS. if you are enabling DTS HD master on the menu for a blu ray disc this only outputs through the HDMI port not optical. This goes with all the new versions of DTS. If it is just DTS 5.1 it should go through. Make sure you have all the latest updates for your PS3. Make sure you are enabling DTS in the PS3 menu for optical out.( i dont own one so i dont know the menu at all) I just want to help. I hope this helps alittle and good luck with this.

Yeah, this TV has problems, look into replacing it's power supply board
http://www.google.com/url?sa=t&source=web&ct=res&cd=4&url=http%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-67261-24966-0%2F2%3Fmpre%3Dhttp%253A%252F%252Fcgi.ebay.com%252FDAEWOO-DTS-42-Plasma-TV-POWER-SUPPLY-BOARD-1H217W_W0QQitemZ350192148676QQcmdZViewItem%26itemid%3D350192148676&ei=MzPJSrvmApDSsgOu65miBQ&usg=AFQjCNGqyxaJLx8y2wadBxxtd36ld6AFsA&sig2=eG7Zzl2d0jIPoQLcOyFjvQ

i have the same prb