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Hi There, I have a Samsung SMC142 which I use for the security cameras around my home. It has four channels which connects to the 4 respective cameras. We had a power outage and when it was restored, the monitor remained blank. The power light is "Red" but the screen is blank. Any thoughts as to what has happened? Cheers, Sal

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  • sala1200 Jul 08, 2010

    Thanks for the very detailed solution. I'll try myself first but if all else fails I'll get my electrician in. Again... MANY THANKS!!

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HI
I hope I can help you with your issue,
First , you open the back cover of the television to check for dry soldering, if found resolder, but if otherwise

Either the power supply has an issue , or you have a bad buffer board and Ysus scan board or both.red light indicating may mean power supply , 7 blinks the buffers and y board.
A repairman will usually just order the boards and you will spend about $550-$600 on the power supply or over $700 probably around $850 if its the Y board and buffers.


It could be just a few bad capacitors on the Power Supply, there could be a bad capacitor on the Y board if its bad it needs to be replaced with the buffers together
If you want to attempt the repair yourself you can do a visual of the power board caps will appear swollen on top.
The ones you are looking for are located almost center bottom of the power board,Usually I can see them clearly with the back on simply shining a light into the back through the holes


With the back removed you will see a few circuit boards the upper one (ac cord runs to it through a small board) is the power supply, it has alot of capacitors on it (cylindrical standing straight up soldered in and marked on the sides with the positive/negative sides and uf and Volts values)
Philips uses 2200uf or 3300uf at 35Volts rating capacitors, they cost about $1-$2 each

The power board and back unscrew with a torx bit and screwdriver size 10 and 15 , if you do not know how to desolder and resolder then do not attempt this as you may damage the TV more than fix it.
We do not recommend do it yourself, but depending on your knowledge and technical ability you may be able to.
You can replace the whole power supply, but samsung has a few versions in their sets and some so called replacements won't fit due to cable location (sockets) being in a different spot.
If there is a blinking red light on the TV count the blinks,if it still blinks after replacing the swollen cap this would indicate a bad buffer board ,
check the capacitors by looking for the swollen tops I hope thats all it is (usually is), if there are no bad caps , then Power supply board just die.It can be dead at anytimes.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
Good luck....


Posted on Jul 08, 2010

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