Samsung model number hl61a750a1fxza - Sony Grand WEGA KF-42SX300 42" LCD TV

Lots of issues with that model. Video and text help, but it is old technology and needs replacing.

https://www.google.com/search?q=DLP+HL61A750A1FXZA.+Why+is+it+turning+on+and+shutting+off

..

The lamp cooling fan needs to be replaced.

Here is the manual
Samsung HL61A750A1FXZA Getting Started Manual

go into menu reset picture settings to default
red , tint or gamma is off

bad color wheel from your description. Might want tolook into the free repair option.http://www.samsung.com/us/dlptvsettlement/ SAMSUNG Digital World DLP TV Settlement Notice

Replace the fan with a new one and check. The the voltage to the Fan. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

the fan behind the lamp fails the most. http://ww2.justanswer.com/uploads/TVTech1/2011-03-20_172928_untitled_-_1.jpg

Google the model number with lamp and take your pick

sounds like the converence is out, and that is why it is shuttin g down on you, and it is going to run around 350 to get repair. ConvergenceICs' needs replaced.

Hello,
I am not so sure , because difference engine difference lamp.
Make sure that lamp same with spec in your TV set.

BP47-00023A , LAMP;UHP 120W/132W 1.0,E22,65*70,LL
BP47-00018A , LAMP;UHP 100W/120W 1.0,E22,65*70
BP47-00041A , LAMP;300W PHILIPS LAMP,200MM,56*56,132W,

Thanks.