Question about Sony STYLEPRO CPD-E540 (Gray) 21 in.CRT Conventional Monitor

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Retrace line on monitor

My Sony CDE E540 flickers several times during bootup and retrace lines can be seen on the screen. If I set the brightness and contrast to 40 and 40 the screen is gray. right noe the contrast is at 85 and the brightness is at 12, Need help

Steve

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  • SCaldwell Nov 20, 2007

    Thanks for the help,

    I'm an electronic engineer working for Bose Corp. I look for all the obvious first, cold solder like you mentioned and went ahead and sweated all the joints on the yoke and the fly back transformer, adjusted the brightness on the fly back and the problem still presists, got a schematic for it and narrowed it to the vertical control section but not sure which cap in the IC003's control is causing it.

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  • Master
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To prevent serious damage and extend the life of your monitor you need to adjust the main brigthness control of it. it is of the LOPT/Flyback transformer inside of your monitor!

check also for cold SOLDER joints on the main pcb and also on the crt neck Board.

Posted on Nov 17, 2007

  • Rommel Balcita Nov 17, 2007

    adjust the main brightness control while your monitor is on! adjust it to a point where the retrace lines are gone!

    if you have no experience yet with electronic servicing then you should seek help to a qualified technician or send your monitor on a repair shop. they should not ask you for big payment since it wasn't totally damaged or broken yet.

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