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Another E172fpb This time twins-help to Diagnose /Repair

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    #1

    Another E172fpb This time twins-help to Diagnose /Repair

    I have two monitor identical ones.
    The brand on it is dell but the el board clearly prints name benq.

    Some numbers of of the units:
    CN-0m1609-4663-3ak-54WL(lcd #1)
    CN-0m1609-4663-435-36gl (lcd#2)
    E172fpb

    LCD#1 turn on after 1 seconds goes blank.Show display protection when powered first then a color test on left bottom when repeatetly powered.

    LCD#2 turn on it flicks ones and power light blinks .

    Where to start to diagnose bad parts.
    Boards have no visible damage.Nice monitors.

    previous post mentioned transistor(how do i test them)?
    Also the caps (what to look for when replacing them size for size and best place to buy them?
    Should i replace them all and where to start on that.

    Will i work on power supply board (eazy )or on the smaller lcd control board (tiny hard to replace parts)?


    Please share your visdom.
    David
    Tags: None
    #2
    Re: Another E172fpb This time twins-help to Diagnose /Repair

    Originally posted by u4david
    I have two monitor identical ones.
    The brand on it is dell but the el board clearly prints name benq.

    Some numbers of of the units:
    CN-0m1609-4663-3ak-54WL(lcd #1)
    CN-0m1609-4663-435-36gl (lcd#2)
    E172fpb

    LCD#1 turn on after 1 seconds goes blank.Show display protection when powered first then a color test on left bottom when repeatetly powered.

    LCD#2 turn on it flicks ones and power light blinks .

    Where to start to diagnose bad parts.
    Boards have no visible damage.Nice monitors.

    previous post mentioned transistor(how do i test them)?
    Also the caps (what to look for when replacing them size for size and best place to buy them?
    Should i replace them all and where to start on that.

    Will i work on power supply board (eazy )or on the smaller lcd control board (tiny hard to replace parts)?


    Please share your visdom.
    David
    The problem is in the larger power board, not in the smaller video board.

    Read these two articles to learn more:
    http://syscon.wordpress.com/2007/07/...klight-repair/

    http://www.electronicrepairguide.com...or-repair.html

    If the 2SC5707 transistors are the fault, the D44H11 transistors are a great alternative to the 2SC5707 transistors if you cannot source the original 2SC5707 transistors. The MJE3055 transistor was mentioned in some places, but it will run VERY HOT in normal operation if used.
    My gaming PC:
    AMD Phenom II X6 1100T Black Edition 3.3GHz Six-Core CPU (Socket AM3)
    ASUS M4A77TD AMD 770 AM3 Motherboard
    PowerColor AMD Radeon RX 480 8GB GDDR5 PCI-Express x16 3.0 Graphics Card
    G.SKILL Value Series 16GB DDR3-1333 RAM (4x4GB dual channel)
    TOSHIBA DT01ACA200 2TB 3.5" SATA HDD (x2)
    WD Caviar Green WD20EARX 2TB 3.5" SATA HDD
    ASUS Xonar DG 5.1 Channel PCI sound card
    Antec HCG-750M 750W ATX12V v2.32 80 PLUS BRONZE Power Supply
    Antec Three Hundred Mid-Tower Case
    Microsoft Windows 10 Pro 64-bit
    Microsoft Windows 7 Ultimate SP1 64-bit

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      #3
      Re: Another E172fpb This time twins-help to Diagnose /Repair

      Ok that is good
      .But I do not see any visible damage on capacitors or any other damage.So how to start testing this boards?

      I got el. tester jus need a hint where to start?

      Should i just replace all the capacitors to start with?
      Should I Test circuitry?

      Comment

        #4
        Re: Another E172fpb This time twins-help to Diagnose /Repair

        oh yeah i over looked the links.thanks.That will get me going

        Comment

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