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I cannot get the dvd player to power up. I have it plugged into 110 outlet , hit power button nothing happens, the red light will not come on. This is a fairly new player, around 3 to 4 months old and was working great until now. I know I should go ahead a just buy a new one for the price, but this has now turned into a mission to get this one fixed.

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  • david93555 May 11, 2010

    Hello kbzon, I have done all that you have stated in your last response. I have used the power switch on the device, no go. There is absolutely no indication of the power supply is working, no led's are lit. I have checked the fuse with a multimeter, checked good. I have been inspecting the capacitors looking for any that are blown or bulging, they all look good. I have not put a multimeter across the cap's looking for shorts, I will do this next. Do you have any other suggestions for me. I am an electronic technician with a fully stocked electronics lab, so you can tell me to do something and i will know how to do it.



    I did find something suspicious, there is a DC to DC converter (Q1031) part # K3498 that seems to be shorted source to drain, this may be normal though.



    Thanks for your help

  • david93555 May 11, 2010

    After checking the caps around the shorted FET, found out the FET was not shorted after all. There is a capacitor and a transistor between the source and drain of the FET and the transistor is shorted making everything in that circuit look shorted.



    Thank you for pointing me in the right direction.

  • david93555 May 14, 2010

    this solution pointed me in the right direction and have found the problem. Thank You very much!!

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  • 476 Answers

Hi david93555. First, you need to make sure that the remote control is operating and not throwing you a curve, try powering the dvd player from the power key on the device itself.

Secondly, verify if you are geting any type of indication that the unit has a functional power supply(usually the manufacturer uses an led lamp or pilot lamp that will light up as soon as the unit is plugged into an AC outlet.

If you do not have a functional power supply you'll have to take the cover off and take a quick but close look at the power supply area( you can locate it if you follow the AC cord to where it pluggs or solders into the board, another way is to look for the main fuse). Look for a good fuse (make sure is clear and not browned out) not blown or even check for continuity if you know how to use an ohmeter, Also look for blown or inflated electrolytic caoacitors, this is very common on the power supplies used on these dvd players.

note: always unplugg all electrical cords from the AC outlet before you do any inspection of electrical circuitry.

Posted on May 10, 2010

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  • jaime vargas May 11, 2010

    It could be that you do have a shorted FET, but check for e. cap values around the FET circuit, usually when the FET shorts out it will take the main fuse, and fusible resistors.

  • jaime vargas May 11, 2010

    Hi david 93555, while checking my profile I see that you are consulting with another expert, did I miss a reply from you? or did you just did not like the answers I gave you.

    kbzon

  • david93555 May 13, 2010

    Hello kbzon, I did not ask for anyone else to help me with this problem. I am completely satisfied with your help. This other reply came out of no where and i am just as suprised as you are. I don't know if you got my last reply, if not here it is for you.



    "After checking the caps around the shorted FET, found out the FET was not shorted after all. There is a capacitor and a transistor between the source and drain of the FET and the transistor is shorted making everything in that circuit look shorted.

    Thank you for pointing me in the right direction."



    Thank you again and sorry it took me so long to respond back to you.

  • jaime vargas May 13, 2010

    Thanks for your reply, it did surprise me too, and I did get your last post, Thanks again.

    kbzon

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  • Master
  • 6,993 Answers

Hello,

from my experience, I think your player is having a power problem. It must have received excess voltage/irregular power supply which has damaged an IC or capacitor on the power board of the player.

Sometimes this excess power supply might damage the player's main board. This is why it is advice able that you use step down for your player, because DVD player don't need excess power as something might be damaged.

To solve this problem, you will be needing a meter. Open the player, use the meter to read the components on the power board as it will help you discover the component that got damaged and you can then replace the bad component.

But if you do not have the knowledge of fixing this problem, you might be needing the help of a service technician.

Good luck.

Posted on May 11, 2010

  • Walesarumi
    Walesarumi May 13, 2010

    Okay, you can let me know if you need any further assistance.

    I look forward to your reply.

    Good luck.


  • david93555 May 14, 2010

    Hello walesarumi, I do not need any more help. I have found the problem and currently fixing it. I do appreciate your solution and your time for this problem. I'm sure i will need assistance in the near future. Thank You again!!

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