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I have a big screen Mitsubishi TV WS-55859. The green light on the front was blinking and the set wouldn't turn on. I read on the internet to replace the capacitors on the dm board. I did that and the set turned on but after awhile it tuned back off and the green light started flashing again and the set wouldn't turn on. If I unplug it and let it sit for awhile and then plug it in, it will flash green for awhile and then I can turn it back on. It stays on for about 5 minutes and then shuts down again.
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The blinking light is what's known as the blink code. The blink code tells you what the problem is. To find out what it means, count the number of times the light flashes then Google your make and model with the words blink code added to the end. This will show you links to sites that will tell you what the problem is.
Poor solder connection and Bad STK ICs 2 of them replace Both Big Black IC will have part number on them Call Mats for STK 1-800-628-1118 example
STK392-570.
you need the V21/V19 DM repair kit which is available at the following link which has the replacement capacitors and the step by step instructions with pictures.
This problem very well could be a DM board problem. I have a how to fix file if this is indeed your sets problem. Leave your email and I will send it to you. Good Luck
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