Question about Samsung LN-S4051D 40 in. LCD Television

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Samsung 40" 1080P power flux

My 40" Samsung screen goes through the motion of power cycling down but then recovers. The power light never goes out, but the screen goes completely black. It will do this once every 20 to 30 minutes. Power strip appears to be in good condition. TV is 13 months old. Thanks

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Try to replace the Power Supply board first.

Posted on Feb 01, 2008

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Posted on Jan 02, 2017

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When the system is turned on the power light goes green for a second or two and then beeps and goes red.


You can fix it yourself. The CPU was to hot and the solder has come off. Bad part is the solder is under the CPU and must be heated up. It is lead free so it needs more heat then lead and you need to add flux. I would start by getting the board out. Remove the thermal paste off the CPU. Add flux with a flux pen. You want to get the flux under the CPU so you might want to tip it on its side. After you have a good amount of flux under the CPU you want to start to heat the parts around the CPU. I would use a heat gun with temp. settings. You first want to heat around the CPU to keep solder on the other parts from cracking. You dont want to over heat the parts. After you preheat the board you want to heat the CPU. It needs to be around 400 or 500 degs f. a good 15 or 30 sec. keep moving the heat gun. After heating the CPU you want to start the cool down. Same as warming up the board but you want the board to cool down slow. After all this you want to add New thermal paste to the CPU. This helps transfer from the CPU. This is a must because your PS3 is overheating as it is. After you do all this some people say it only works for 2 to 6 weeks. Its all on how you find the board and how good of a job you did. I would back up your hard drive. Then hope for the best!! good luck and i hope this helps you out.

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1 Answer

Turn on power light goes back to red and doesnt work


Yellow light of death. You need to tear your machine down to the motherboard and flux the board and reflow it.

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-it is a power problem. -i turn on my ps3 system using the main power button on the back of the console and the red light comes on in front. -i then touch the standby button in front and the red light...


You can fix it yourself. The CPU was to hot and the solder has come off. Bad part is the solder is under the CPU and must be heated up. It is lead free so it needs more heat then lead and you need to add flux. I would start by getting the board out. Remove the thermal paste off the CPU. Add flux with a flux pen. You want to get the flux under the CPU so you might want to tip it on its side. After you have a good amount of flux under the CPU you want to start to heat the parts around the CPU. I would use a heat gun with temp. settings. You first want to heat around the CPU to keep solder on the other parts from cracking. You dont want to over heat the parts. After you preheat the board you want to heat the CPU. It needs to be around 400 or 500 degs f. a good 15 or 30 sec. keep moving the heat gun. After heating the CPU you want to start the cool down. Same as warming up the board but you want the board to cool down slow. After all this you want to add New thermal paste to the CPU. This helps transfer from the CPU. This is a must because your PS3 is overheating as it is. After you do all this some people say it only works for 2 to 6 weeks. Its all on how you fix the board and how good of a job you did. I would back up your hard drive. Then hope for the best!! good luck and i hope this helps you out.

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