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HP-D2402E0 PSU starts then stops

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    HP-D2402E0 PSU starts then stops

    PSU with a model number HP-D2402E0

    Fault: When the start button on the desktop is pressed the fan briefly (1 or 2 seconds) starts spinning and then stops. Sometimes it will continue starting and stopping, other times it will cycle once and then stop.

    Tests conducted: I removed the PSU from the desktop case and plugged it in to the mains. I then shorted the green wire to earth and the fan spun up normally So when the PSU is connected to the motherboard it fails but when it is disconnected from the motherboard it works as normal.

    Possible conclusion: From what I can see I think it may be the motherboard.

    Any thoughts on the subject would be appreciated.

    #2
    Re: HP-D2402E0 PSU starts then stops

    Does it normally in another computer correctly
    9 PC LCD Monitor
    6 LCD Flat Screen TV
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    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
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    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

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