Question about Sanyo DP42848 LCD TV

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After momentary power outage picture & sound are gone. Power Indicator light is lit & TV makes sound like it is turning on & off. After a while TV does turn it off by its self.

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  • bobpir52 Jun 16, 2010

    I did not find any bulging or leaking caps on either main board or power supply. I replaced the power supply with a new board & still same problem. I thought maybe a fuse but cannot find it. No sound so I don't think backlight inverter could have anything to do with it. In my opinion it must be main board but I hate to replace it & find it is something else. Not much left. Anyone have any other ideas?



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Caps on main board probably exploded

Posted on May 28, 2010

Testimonial: "Had a feeling it might be board but the caps (capacitor) exploding was nice detail. "

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Not the main board,it the power supply board that have those dead capactors leakages they puff up it tops or bulges up it tops have gases leakage.The power supply board,that the board where the power a/c cord plug into it.Have soldering iron,desoldering pump,solders,must have basic understanding of electronic's and know how to do soldering before even can replaced those dead lekage capacitors.Or tries websibes like, to buy a whole refurbish power supply board for the replacement.

Posted on Jun 02, 2010

Testimonial: "That was a great help. Now I just need to find part"

  • Chi Chu Jun 17, 2010

    Capacitors leakages that bulges ups,useally dead in use of power up tv normally.The problems u describe earlier was related to the power supply board,but it dumb a load of power to ur tv at once u replaced the power supply board.It not wrong,just the other board it dead too.Still the same problems,than the power outage must put to much power to ur tv main Tuner board it kill that board too.replaced the Main Tuner board too should fix this problems.



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1. momentary sound, then no sound no picture; 2.

Hi, if the power indicator flashes 4x blue more then likely its a SDR buffer logic board. When you take the back cover off they are the long boards on the left side of the tv. There are 2 boards. If you look closely at the black chips on the boards which there should be 8 on each. If you see a burn mark or a deep scratch mark then the chip is fried. If you take the lower one of and turn the tv on it might come on and if not try the top one. Please rate me and let me know how you do.

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After a momentary power outage Panasonic LCD TV has a flashing red light and will not turn on.

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