Question about Westinghouse 19" Widescreen Flat Panel LCD Monitor
The screen began simply going black and I would turn off and then on and it would come back on. Now it won't turn on and the light at the bottom right of the monitor blinks off and on. It use to stay on when the screen was on. HELP. It's only a year old?
I had the same problem, except I plugged in another monitor and IT works. Could that still be the Cap problem?
Posted on Apr 13, 2010
Nearly all of this kind of problem is caused by the use of really cheap electrolytic capacitors in the power supply.
To achieve the highest efficiency, most all power supplies are of the 'switched mode' type but this design places higher demands on certain components and if the poorest are used, they just don't live very long.
If you are lucky, you may be able to remove the back housing of the unit and locate the failed parts.
They will be in an area of physically larger parts and the likely bad capacitors may have swollen tops or leakage around the base of them. Look for cylindrical parts with a shrunk insulating sleeve with printed values on it. You should find values such as 'uFd,' VDC.
It isn't necessarily only the larger parts that fail; some small value parts (4.7-100 uFd) that sit in the feedback path can gradually fail until the power supply just refuses to start up any more. BTW, this sounds a lot like the path yours took before crapping out completely.
You could write down all of the values you find that seem to be related to the same circuit, order and replace them all. Only use parts rated at 105 degrees C and try to find only those rated for 'switched mode' power supplies are at least identified as 'low ESR.'
I recommend Mouser Electronics for small orders; they have no minimum billing and charge the actual shipping cost.
Posted on Feb 03, 2010
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Posted on Jan 02, 2017
This is a suggestion to consider looking at your video card. you could have a video card going bad. you can replace the card for a pretty reasonable price. Look at places like newegg.com or tigerdirect.com for a new card. if you have a second monitor that is one way you can see if it is monitor or the video card. Make sure you have a good connection and the pin connectors in the VGA cable is in good shape.
Posted on Feb 21, 2009
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:
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.
Posted on Apr 22, 2009
SOURCE: screen turned black
your monitor got a hardware problem:
1) the LVDS controler board out of work, only change or repair it could be fixed.
2) if you can see some show like smaller signal detect windows in the centre of screen a very short time (bright flashing one time), this is inverter board damaged or worn lamps, thay all need repair or replace
hope give you some idea. please take a rating let me know how much helped you thanks!
Posted on May 20, 2009
I suggest you try another video card in your computer. This may be the culprit if the second monitor did the same thing as the first. If the different video card does the same thing, I would then suspect the motherboard.
Posted on May 31, 2009
Check all the connections and if they are all right and tight then the monitor is probably shot. The good news is that it can be repaired. It's usually around $50.00 to $80.00 to fix. Good luck!
Posted on Aug 29, 2009
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