Question about Acer AL1721 17" Flat Panel LCD Monitor

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Acer al711 lcd

I have an Acer AL711 LCD monitor with a problem. It has no contrast but the OSD has contrast. I tried to change it from the monitor menu and it did not work. When I tried to change the color temperature from user to 9300 the monitor goes black, this also happens when I tried 6500, 7500. When I use the recall or auto adjust function the monitors contrast works for the time it needs to auto adjust and then it stops working again. I tried to: change the signal cable, used DVI signal, removed the connectors from inside the monitor to se if it?s a contact problem, used different refresh and resolution. Everything was ok. Is the changing of the monitors control board cheap? Anyone has any suggestions on what to do? Thank you, Cornel

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SOURCE: monitor goes black

Sorry to have to tell you this, but this is common in LCD monitors. The reason that it is going black when it boots is for one of two reasons. You either have a bad power supply that powers your LCD or your LCD's backlight is blown. These can be repaired or you can purchase a new one. But if it goes black 9 times out of 10 is because the backlight is bad. These can be repaired!

Posted on Nov 26, 2007

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SOURCE: Acer AL2216W 22" LCD monitor. DVI input apparently

Not Good..
After you've checked that the video cable is connected properly, make sure that all the pins in the video cable plugs are straight and not broken off. Then test on another PC. Make sure your CMOS battery has not gone flat, as some PC's will fail to load basic drivers if CMOS memory is lost. The battery should show no less than 2.5v, if it's marked 3 volts when tested on a multimeter. If you can't test it, just buy a new one at the supermarket or hardware, usually around $4.00.
Next thing to try is your Video Card . If it is an on board one like most are now, there isn't anything you can do but try another card in an expansion slot or fit a new motherboard. At this point, I'm sad to say, you're better taking it to a PC shop where they will have a few things at their disposal to try.

Posted on Jan 30, 2011

  • 11361 Answers

SOURCE: Acer AL2216W 22" LCD monitor. DVI

You may have problem in the logic board, it uses surface monted components no much chance for DIY repair.
Service manual;

The cases these days are hard to open, they use plastic finger hooks types, they go in easy but real hard to remove without damageing them.
Use thin flat blade to crack open at the bottom edge so the scratches will not be so noticeable, and work your way around, look out for cables attached to the front bezel also.

Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors:

Learn about bad caps:

Capacitors kit: he can make you a set of caps for you.

Or just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Please leave rating if it helps.

Posted on Jan 31, 2011

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Best regards,
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