Tv not powering up

To my knowledge this set has no factory reset in it.

Well its seems that your transformer might be blown(no power right), you might want to open it up and see if there is a fuse on the main power bpoard(just trace your power cord) if the fuse is good you might want to change the transformer. It could alose be some other components on the power circuit, like the diodes and capicators, but in my experience the two things that go pop it the transformer and capicator.. If yoy are not a skilled technician i suggest you take it in to a tech for repairs..

Main power supply regulator section to your TV has the fault. Check and replace faulty component/s there.

Bad caps in the power supply section (look for bulged and/or leaking capacitors) or dirty contacts on the main power relay (if it is an older CRT type) are the most common causes of those symptoms.

The original is no longer available. The only choice you will have is to purchase a universal remote control. You can pick them up at most electronic retailers and also places like CVS, Good luck : )

If you unit don't have RCA (push on jacks), then you will have to buy a RCA to coaxial converter box.

Heres where you need to go for the codes and programming procedures; 

http://www.comcast.com/corporate/customers/customer_support/remotes.html

Ur high voltage is dead,FBT,the flyback transformer,the big block of plastic with a red wire with a cap hook to CRT(tv tube).

Click the menu button on the front of the tv.There should be an input selector there.

For Daewoo TV Model DTQ-27U4SC, try this for Comcast Universal Remote (one with the red select button):
1. Press TV button
2. Press Setup button until TV button blinks twice
3. Enter 10451
4. Press Power button (TV should turn off and is set)