Color splotch when TV is powered on, then TV powers down automatically

This table is the information used by MOST diode manufacturers that use color banding on diodes. Most manufacturers stamp the ID right on the diode but some do use color banding as the method of identification. For purposes of alignment, the side with any color band closest to either side of the diode is the equivalent of the left side of this table. The three examples in the table when associated with the values in the lower table, are identified as 1N64E for the top diode, 1N452G for the middle diode and 1N4762 for the bottom diode.
See the color coding

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The color wheel can be ruled out by looking at it---it faces the lamp and can be seen---look to see if any segments of the wheel are missing or if the wheel is totally shattered.

Other than the wheel I am concerned by "blue splotches etc" as it might be a DMD gone bad. Look at the attached photo and the color wheel first.

did you install the correct color wheel? Most of the samsungs had retooled bearings in some color wheels and often a jumper has to be installed for the color wheel to work properly. Your wheel should be a BP96-01103A another thing that can happen is the thin brown ribbon cable can get plugged in backwards and will prevent the color wheel from working also. That ribbon only has contacts on one side of the ribbon. I would double check that if the correct color wheel was received for your model.

Blue color production circuit is fine. Red and green color circuit not getting power, the same power also goes to sound unit. if that is rectified, issue would be resolved.

Check the color wheel, take out lamp and look at color wheel with flashlight see if moving, make sure you tape down or up lamp door switch. If color wheel turns or not? Have same tv my probelm was the color wheel. cost around $70 easy to install>>>>

Time for a new TV... Unless your really really really attached to that TV your going to spend more money on it then its worth to try and troubleshoot and repair it. Most of the TV's that come across my bench for repair that have developed lines and color splotches go into the recycling dumpster, they just aren't worth the time to repair as it usually comes down to a bad board or components that just can't be obtained to repair it. What most people don't realize is that once a tv is a couple years old there just isn't service parts for them anymore. The manufacturer keeps parts available until the warranty period is up on a model then its done for.

Sounds like your color wheel may be at fault. Do you ever hear any unusual noises coming from the rear of the TV? Color Wheels usually make a humming sound as they go bad. This is because the tiny bearings in the color wheel motor have begun to misshape from use and heat. This is a known issue in this TV! Expect to spend $300-500 to have this serviced by a service company. If you have the right stuff, you can do it yourself. If you search the web, you'll find a color wheel for this TV for under $100, but installation can be tricky.

michtech

Unfortunately it sounds like your problem is down to failure on the DTV main board, this is a common problem.
http://forum.ecoustics.com/bbs/messages/2/429280.html there's more information here and the forum operator can also sort out repair for you.

4 inch multi color strip in middle of picture?