Question about Samsung SyncMaster 931B 19" LCD Monitor

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SyncMaster 931B blinks on and off after I have turned on my computer. I tried disconnecting the power source and reconnecting. I also tried pressing the Source button.

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You may have dying power supply due to bad DC filter caps just like other SAMSUNG as shown in my albums.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Posted on Sep 07, 2010

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Problem with sansung syncmaster 931b off/on switch. I have to turn it off/on about 12 to 20 times before it stays on. Thanks Bob.


Hello,

Your power supply board is not yet dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


Hope this help

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1 Answer

Screen blinks on /off - can syncmaster 931b be repaired?


This model was released in 2001, you need to open it up and look for bad caps with bulging top first, the problem can also be in the backlight inverter circuits. Post back what you see so we can guide you further, see example of failed SAMSUNG monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

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1 Answer

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First palce to check will be the power supply section, look for bad caps (bulging tops), post back what you find inside so we can guide you further, see example of failed SAMSUNG monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

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Hello try to press the power button to turn off the printer, then press the power button to restart the printer.
If the lights continue to flash,press the power button to turn off the printer,disconnect the printer from the power source,reconnect the printer to the power source and finally press the power button to turn on the printer.
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Samsung 931B Monitor and computer and switched off overnight. In the morning I switch on the monitor and computer The monitor switch button glows blue Display flickers on and off maybe 5 or six times then...


possible you have a loose connection in the cables.
try disconnecting and reconnecting a few times.
if there are smokers near the pc they can get pretty dirty with nicotine

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1 Answer

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Open the case, remove the power board and visually look for bulging caps. I replaced 3 on mine and now its prefect.

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