Question about Acer AL1711 17" LCD Monitor

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Acer AL1714 I believe the inverter is dead on my Acer monitor. When I hold a flashlight up to the screen I can see the desktop. If I unplug and plug the monitor the lights flash on for a split second. When I opened the monitor up one of the capacitors I believe had a black spot on the copper wiring., I called Acer to see if I could buy the part and surprise.....they no longer make it (the monitor is just over 3-years old). I have seen somewhere online where people say you can use inverters from cold cathode pc lights to fix this issue. Does anyone know if this is true? If so, could the inverter be connected to the pc with power wires running to the monitor? I hate to throw this out.

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  • SXViper03 Sep 17, 2008

    When I refer to the lights flashing on I mean the monitors backlights.

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The inverters often fail from capacitors that have lost so much of their original capacitance and developed losses great enough to disable the circuit.

If you can identify the inverter section, you might want to replace any capacitors you see - a 'shotgun' approach, since locating the defective cap requires a fairly wide range capacitance meter with loss (DF) measurement feature unless you are lucky enough to locate one with a bulging top or crystalline deposits around the base. These instruments cost upwards of $200 so for a single use it doesn't make sense.  About the only part in that circuit that might be unique is the transformer so everything else can be bought or substituted. The lamp itself could have failed and these are available under similar part numbers from multiple sources. If the lamp has strong discoloration toward the ends, I would replace this first.

Posted on Sep 17, 2008

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It would seem that you are on the right track. If the desktop could be seen (albeit very dark background) then it could either be the CCF Lamps (cold cathode florescent) or the inverter that powers the lamps. One way to verify is to shine a flashlight at an oblique angle to the screen, semblance of part of the desktop could be seen.

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Hope this be of additional help/idea to Coolguy's assistance. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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The problem you have is with the backlight lamp, which is not turning on. When this happens only because lamp is faulty, Acer LCDs have a security switch that will not turn the screen on at all and will return a blinking light on power on led , as diagnostic feedback.
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Regards

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