Strange problem with Acer V193W

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  • selldoor
    Slow Learner
    • Dec 2010
    • 7870
    #21
    Re: Strange problem with Acer V193W

    I dont know how to check an oscillator even have trouble spelling it- I think you need an oscilloscope. Check that in putting it together you have not pulled out the lvds cable between the main board and panel. If its a flat, one take it out clean it and put it back.
    Check again all caps are the right way round
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

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      • srbax
        Senior Member
        • Nov 2012
        • 78
        • Serbia
        #22
        Re: Strange problem with Acer V193W

        I tested cable with multimetar while it was connected and I had beep sound on every pin. I examined pins and they are nice and clean.

          Comment

          • srbax
            Senior Member
            • Nov 2012
            • 78
            • Serbia
            #23
            Re: Strange problem with Acer V193W

            I replaced quartz kristal too.
            When I unplug signal cable everything is working and there is message 'no signal,check cable'.
            I was reading somewhere about reseting monitor, and for this Acer, it's possible to enter factory mode by pressing two buttons: menu and ecolor.
            Holding those two buttons and powering monitor couple of times I tried to reset monitor.
            I got picture while I was holding those two buttons only.
            When I try to press any other button picture is gone.
            Any idea guys?
            Maybe reprograming could help. Where can I find files for that?

              Comment

              • srbax
                Senior Member
                • Nov 2012
                • 78
                • Serbia
                #24
                Re: Strange problem with Acer V193W

                After some research on internet I found solution.
                Two bad smd transistors are reason for this problem.
                They are not shorted, they just not working properly.
                Theirs positions are Q110 and Q111 with label M7A, originally MMBT2907A.
                I couldn't fined the same and replaced them with BC807.
                And now, monitor is working!
                Now there is only small problem with EDID data.
                I think it's corrupted, and there is no valid data about name, size and supported resolutions, but monitor is working normally at it's native resolution.
                Could somebody help me with this?

                  Comment

                  • selldoor
                    Slow Learner
                    • Dec 2010
                    • 7870
                    #25
                    Re: Strange problem with Acer V193W

                    Wow - that is some researching- well done - if the EDID data is corrupt I dont know.
                    Here is a blog which suggests it very difficult to sort:
                    http://blog.komeil.com/2008/06/fixin...no-signal.html
                    Relates to dvi but presumably for vga you would just flash the vga port.
                    Please upload pictures using attachment function when ask for help on the repair
                    http://www.badcaps.net/forum/showthread.php?t=39740

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