I have this real strange problem.When I try to power on my 37" magnavox lcd it will not come on right away,what happens is this:
I press the power button the green light comes on then it starts flashing,
then the light becomes bright,it does that for about a minute then it goes off.I power the tv on again,the green light flashes for about 15 seconds then it goes of,I power the tv on again for the third time this time the tv comes on,please help with this problem.thanks
model # 37mf331d/37
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power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
This is the power supply board problems.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.Or take the power supply board apart's,check for those capacitors parts are dying,alway bulges up it tops or puffing up on it tops.U have tools and kmow basic electronic and soldering.Replaced these dying capacitors,tv should come on right away.Use a cooling fan,turn it on high,put close to it.All the dust and particles.Will blown out.
Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; [Exclude the model number], in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
This problems,very common in LCD tv,after the tv was in used about a year or two.The new technalogy LCD tv don't handle heat very well,not like the old CRT Tube Tvs.The power supply board tend to have bad capacitors componnents leakage,that bulges up it top or puff up gases escape,that why it take times or couples pushes to the power botton to turn the tv on.U know basic electronic's,and have soldering tools and solders?Take the tv aparts,check for these bad capacitors,that bulges,puff up in the power supply board and replaced them,than ur power will work normal again.Or tries Websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
Disconnect the LVDS Cable that runs from the small signal board to the display panel and apply power,if the screen comes on,the Small signal board (aka Scaler Bd ) is the faulty board. other than that,all that's really left that has gone bad for me is the logic board.
This is a big problem with these tv's. Magnavox built them with undersized capacitors, and they blow. You have to open the back, remove the power supply and replace the capacitors numbered 2074 and 2081. This sounds like a real tech job, but read my other solutions, and you will see it is not so hard. Good luck.