Television and Home Theater

got a couple panels off and about 30 screws where is this DM circuit board really located,hate to pull more screws outI don't have to remember to put back in....got a Mit wd52725 model

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when i plug it in the red stand-by ligh illuminates, then i press the power button and te green led blinks 4 times and stays on on the 5th time. at this time the screen is illuminated but blank and i have audio. i have tried different inputs with the same results. i removd the back panel and visually examined everything andit appears ok (no buldging caps, burnt spots, ect...) so with everything still connected i checked for 6v, 12, 24v and they are all present.

Just replaced all the capacitors on the DM board because TV was not coming on at all. Now the tv turns on just fine, plays for about 1 minute then shuts itself off and green blinking light comes on. The blinking light turns itself off after about 2 minutes. When we do the the error code it comes up one blink, then two blinks which we were told is no error. Can anyone give us any ideas what we could do next????  Thanks!!