Question about Samsung 19" LCD Syncmaster 931BW Monitor

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Monitor don't start with start of PC.

Blue light is blinking and monitor starts after long time...(about 2 hours).i tryed monitor with other PC but there is the same problem.thx for reply.bye

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  • 19 Answers

Replace the electrolytic capacitors on the power supply board.
Some will have bulged, but it'll be a good idea to replace all of them

Posted on May 15, 2010

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Posted on Jan 02, 2017

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Probably the power supply is failing but periodically recovers briefly.

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Acer am1100 won't start up


Discribe what happens when push the on/off button and you try to boot, fan spin? LED's blink? HDD/DVD light blink? Sound? Any thing on screen at boot? What blue light?

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Lg m197wd blue light blinking and fire


I had the same problem on a LG w1934s
There is a capacitor standing next to 2 transistor on a heat-sink. The cap had a bulge on the top. I replaced it and now the monitor works fine. Hope this helps.

Feb 18, 2010 | LG Computers & Internet

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VL 1919 power button blue light blinks and screen


Yea I fixed it ..bought a new monitor......I tried the old monitor on two other PC's same problem.....

Nov 23, 2009 | Computers & Internet

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No picture - blinking blue light. My daughter was


There are a few things you can check. First, try to see if the monitor cables are firmly connected on both sides (computer and monitor) no need to remove any cable for now just check the monitor cables (ends should be blue or white on both sides) Then check if you got an imput button on your screen (like all TV and some monitors now has) This input gives you the choice between a few possible connections and it may be on the wrong one. Just cycle trough the input modes and I think you will have your image back. If Still, you dont see anything, try a different monitor or try to connect your monitor on a different PC/laptop. In fact blinking blue could be there because the monitor is awaiting a signal on the input it's listening. At worst it could be because your video chip/card dont send a signal to your monitor, could happen, but imo it's probably not the case.

Jun 08, 2009 | Gateway 1532121 Monitor

1 Answer

Dell E173FP Screen blinking red, green, blue, white


The monitor is probably on protection.

To start unplug monitor from power and from computer and test computer with different monitor to find out if it is monitor or computer fault.

If it is computer fault and no video signal , then test:

  • Video cable.
  • Video adapter on PC (sometimes integrated on motherboard)
  • Motherboard.

If it is monitor fault , then the monitor is on protection.

When on protection you keep having a flashing led on front of the monitor , and monitor turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the monitor will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, faulty inverter board, faulty input board, or a fault on LCD Digital Controller board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Apr 16, 2009 | Dell E173FP 17" LCD Monitor

1 Answer

Blue blinking light


The monitor is probably on protection.

To start unplug monitor from power and from computer and test computer with different monitor to find out if it is monitor or computer fault.

If it is computer fault and no video signal , then test:

  • Video cable.
  • Video adapter on PC (sometimes integrated on motherboard)
  • Motherboard.

If it is monitor fault , then the monitor is on protection.

When on protection you keep having a flashing led on front of the monitor , and monitor turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the monitor will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occurr are a blown capacitor on power board, faulty inverter board, faulty input board, or a fault on LCD Digital Controller board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing statebecause of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

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1 Answer

Blue power button flashing with blank screen


This is most likely the power inverter board in the monitor - this is common in many monitors. If it started taking longer and longer to display an image, and the power light is blinking on-and-off, that's the problem. You can confirm that it's the monitor and not your computer or the cable by plugging in another monitor if you have one to try.

If it's under warranty, send it back, if not, there are inverter boards for many common models of LCD monitors that are replaceable. The board can run anywhere from $50 on up. Depending on how old it is, you may find it better to just replace it with a gently used one from ebay.

Jan 03, 2009 | Dell E173FP 17" LCD Flat Panel Monitor

1 Answer

Computer restart issue when graphics card attached.


U PC IS GETTING OVERHEATED AND THEREFORE THE SYSTEM IS NOT STARTING TO PREVENT ANY DAMAGE TO HARDWARE.DOWNLOAD THE SOFTWARE FROM THE INTERNET BY THE NAME EVEREST AFTER INSTALLING PERFORM A STABITY TEST ON URPC.IF DURING THE STABILITY TEST UR PC FREEZES OR SHUT DOWN WITH A BLUE SCREEN THEN IT IS HAVING A THERMAL ISSUE.THINGS LIKE THIS ALSO HAPPENS BECAUSE OF VIRUS.SCAN UR PC USING A GOOD ANTIVIRUS WITH LATEST VIRUS DEFINATION.DOES UR PC SHUTS DOWN AUTOMATICALLY WHILE WORKING OR UR HAVING A PROBLEM WHILE RESTARTING UR PC.LET ME KNOW.PERFORM THE STABILITY TEST FOR ABOUT 1 HOUR.

Sep 30, 2008 | Computers & Internet

1 Answer

LG1717S - Power light flashing - no image.


The monitor is probably on protection.

To start unplug monitor from power and from computer and test computer with different monitor to find out if it is monitor or computer fault.

If it is computer fault and no video signal , then test:

  • Video cable.
  • Video adapter on PC (sometimes integrated on motherboard)
  • Motherboard.

If it is monitor fault , then the monitor is on protection.

When on protection you keep having a flashing led on front of the monitor , and monitor turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the monitor will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, faulty inverter board, faulty input board, or a fault on LCD Digital Controller board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Sep 03, 2008 | LG L1717S-BN 17" LCD Monitor

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