Question about Sun UG-MON-FP (White) 18.1 in. Flat Panel LCD Monitor

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Sun x7144A / GH19PS 19 LCD Turns off after several minutes

Works perfectly for 5 mis, then switchs off, but pressing front button makes it go a bit longer until it wont turn on.
Opened up with a 1 inch wide paint scraper, many screws, and removed a higher quality power board. Tough ******, well screwed together. Used LCR meter to check electrolitic caps in circuit and saw nothing too far out of spec. CapXon brand seem better than many. Nothing looked burnt/unusual and joints looked very good. What should I look at next?

Could it be the blue PTC's? And if so how to test?
Anyway please add this monitor to the 'list'

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  • Canberra1 Jan 16, 2009

    Ive no Idea which chip this is micon novatec nt68f63 .



    Google says SAMSUNG LCD 510n and 710n have this Microcontroller and allude that it may be a processor firmware issue - and a jig and reprogramming - gee these Brazilians are good.



    Usually reseating and checking Vcc on the chip is done before replacing.



    I also wonder if there is some hold in the front buttons master reset

    that resets to factory defaults - so fixing settings that got corrupted

    The busy lots of 120 pins processor is

    MST9131E

    IF140340430F



    The EEPROM with Sticker is

    AF19B_S1.0
    28.9.2004 Q
    (AML) (E08)

    Electro Cans 2 * 100uF 16V
    4 * 10uF 16 V
    Board Marked underneath

    Logic Board
    400024135 SDMA 00179
    AF19B NORMAL S1.0

    Top of Logic Board
    Model MB17AS/BS_NB19AS/BS
    Code No BN41-00313B

    Tinplate stamped
    BN63-00817A


    Power Inverter Board
    REV A
    2003.07.07



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DEar friend you problem is the micon novatec nt68f63 only.You need to change it! Can you send for me the number in label in processor? This number is the checksum of this and I have lost this label best regards.

Aristides Pandelis

aripandelis at gmail.com

Posted on Jan 10, 2009

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