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Never Give Up Attitude In Electronic Repair

By on June 26, 2009

For the past few days I’d been supporting one of my ebook buyer and also an ERG member about no power in a CRT Monitor. He had tried to repair the Monitor but just could not find out the problem. I gave him lots of advice and eventually he emailed me today and i replied back:

I have successfully repaired the monitor! The only culprit was the Power FET, shorted between its gate and source pin. I wonder how come since I’d replaced it before, then I remember when I tried to discharge the filter capacitor, I shorted the drain pin with the hot ground but not carefully touching other pin nearby causing quite big spark.

Congratulation! And in fact from this repair i believe you had learn many thing during the process of getting the Monitor back to life. All this add up to your experience so that you will know what to do whenever if there’s another unit with no power come across you bench. In other word, you will have confidence in tackling any no power symptom in Monitor and other electronic equipment. That’s why i keep on emphasizing you to concentrate to test all the electronic components again because the output was still zero volt and also the Blue ring tester had help out in determining that the primary winding and all the secondary side components were good. You also learn that the power ic could supported by another quite similar part number.

Yesterday I’d also built the power IC tester, and confirmed that the last power IC on board is still good.

This tester could save you money.

Here are the photos. I cannot thank you enough.

You are welcome. It is your afford and your never give up attitude that had brought this Monitor back to life again.

Best regards,
Jestine Yong

Here is the picture of the Monitor:

monitor repair



  1. Henry Thomas

    October 12, 2009 at 3:38 am

    never seen this before but congratulation my friend i have learn something here if i meet up with this problem someday

  2. admin

    October 12, 2009 at 8:10 pm

    HI Henry,

    You are welcome!


  3. Lex Medra

    April 16, 2010 at 4:20 am

    i have a crt monitor Mag 786n and no power, and i heard a tick tick sound what should i do?

  4. admin

    April 16, 2010 at 8:10 pm

    Hi Lex,

    Try this link:

    If there is no output at all from the SMPS then i suggest that you check all components in the SMPS.


  5. Wimpie

    October 17, 2012 at 2:03 pm

    Hi Jestine
    Is there a schematic for this power ic tester?

    • Jestine Yong

      October 17, 2012 at 10:26 pm

      Hi WImpie,

      The schematic I have included as a bonus for the SMPS ebook buyer.



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