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Display won't come on. Perhaps due to power surge. Found a burnt semi conductor attached to a heat sink on the main power board. Has anyone seen this problem before. Is the problem isolated to the powere board or is this just a symptom of another problem. GE Monogram Trivection Oven model zet3038shss.

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  • genny577 Sep 12, 2009

    No the oven does not work at all and there is no buzzing noise. Their was a power supply failure. Afterwards the oven did not work at all. Looking in to the problem we found that there is proper voltage to the power supply circuit board in the oven. However, there is no 12 volt dc output. On the power supply board the semi conductor marked top247y was blown. I replaced this with a new one. When I powered up the oven the component failed once again. So, I believe this to be a symptom and not the cause. My question is where to go from here. Could this be a problem on the main power board or is it possible that the display could be causing this componet to fail? Thanks Keith

  • genny577 Sep 12, 2009

    Magnetron is not the problem.

  • genny577 Sep 12, 2009



    I am new to this board so I am not sure if you saw my reply to the first person I talked to. So, I am sending the additional info to you. (I apologize if you already saw this info.)



    No the oven does not work at all and there is no buzzing noise. Their was a power supply failure. Afterwards the oven did not work at all. Looking in to the problem we found that there is proper voltage to the power supply circuit board in the oven. However, there is no 12 volt dc output. On the power supply board the semi conductor marked top247y was blown. I replaced this with a new one. When I powered up the oven the component failed once again. So, I believe this to be a symptom and not the cause. My question is where to go from here. Could this be a problem on the main power board or is it possible that the display could be causing this componet to fail? Thanks Keith

  • genny577 Sep 12, 2009

    No the oven does not work at all and there is no buzzing noise. Their was a power supply failure. Afterwards the oven did not work at all. Looking in to the problem we found that there is proper voltage to the power supply circuit board in the oven. However, there is no 12 volt dc output. On the power supply board the semi conductor marked top247y was blown. I replaced this with a new one. When I powered up the oven the component failed once again. So, I believe this to be a symptom and not the cause. My question is where to go from here. Could this be a problem on the main power board or is it possible that the display could be causing this componet to fail? Thanks Keith

  • genny577 Sep 12, 2009

    Thanks for the reply.

    I see that there are two display boards and a main logic board. Are you talking about one of these when you say the control panel is bad. The main power board has the failed intergrated circuit which I can replace again. I am not sure which one to replace.

    Thanks

  • genny577 Sep 12, 2009

    I have some experience with electronic & appliance repair. However, not a professional. Insurance is not an option for me. So, I am going to try to fix this unit. Are your reffering to the high voltage diode in the magnatron circiut? If so, this could not be the case because this problem occurs with only the main power board and touch pad control powered up. Someone else said it is common for the control panel to fail on these units causing the main power board to fail. What are your thoughts on this?

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  • Kitchen Ranges Master
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Have you had any type of surges as in lightning,power line, from power supplier or dirty power as in harmonics,distortion of A.C. wave forms this can cause heating and destruction of electronic equipment as in the ranges power board,if not I'd just replace the power board, but it wouldnt hurt to check the neutral connection in your homes main power panel and make sure there is a solid bonded connection everywhere out to the metering equipment from the power supplier

Posted on Sep 12, 2009

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Please remember that I am attempting to diagnose your appliance without being there and with little information.
normaly the fuse will burn out before an outside source of power surge will take anything out but not always. It very well could have been a surge. Although I suspect that it came from within. I would check the board EMI filter and the diode attached to the capacitor. One of these are most likely the culprit.
If you decide it was a power surge, I suggest that you call a good local appliance service company to come out and make the diagnoses. There is some paperwork they will have to fill out so to get your insurance company to cover it. I have to do this all the time and if they are not filled out correctly, the insurance company will not pay. If they cover it and the company fills the paper work out correctly, the insurance company normaly replaces the unit rather than pays to repair. This is due to a power surge not only puts parts out it also weakens parts therefore causing problems down the road.
Please rate solution

Posted on Sep 12, 2009

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Control panel is faulty. You can get one and a manual at repairclinic.com
It is quite common.

Posted on Sep 12, 2009

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  • Master
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It sounds like you have been hit with a power surge. There is no other explanation for a burnt semiconductor. The problem is most likely isolated but you won't know for sure until you replace the fried part or test each component separately..

If you are not into electronics and do not have test equipment you are best off to call a technician in to take a look see.

Posted on Sep 12, 2009

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  • Master
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Hi,

Just wanted to have some more information :-


1. Is your oven working well ?
2. do you hear any buzzing noise?
3. Does it heat the food well?

Kindly back to me with all answers.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Sep 12, 2009

  • taran_2005
    taran_2005 Sep 12, 2009

    Thanks for your response!!

    I guess it might be Magnetron.

    Note - This might be Dangerous. Follow on your Own risk.

    http://www.gallawa.com/microtech/mag_tes...

    I am not positive about any of the options given by you.

    Let me know the update!!

    Thanks.


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