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Monitor power suppply

My computer monitor power supply is not coming. Computer is fine. If connect the computer to another monitor it works fine. I changed the power cord no help. Can you suggest something to find the solution for this.
Thanks
Sudha

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  • sudhadv Feb 19, 2008

    Can you explain where the fuse, resistors, transistor, cold solder are and how to check it?

    Thanks

  • janex2 Apr 23, 2008

    i have also incountered that problem but untill now i have't solve it. i check the power supply output 12 V its working. but still dead set.



    janex

  • vcerty Dec 04, 2008

    i have same prob.

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Hi there, check the hardware of the monitor, do some test at the power supply., i.e. fuse, resistors, transistor, etc., have some check up for cold solder. ty

Posted on Feb 18, 2008

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1 Answer

Do I need both cables for windows machine or can the USB connected to the machine and the mini dp plugged into the monitor work by itself


Is this an external monitor cable? Where the monitor cable that connects to the computer has two USB cables attached at one end?

If so, no. You do not need to plug both ends in. If one is powering the monitor fine and you see no performance problem occurring with the monitor you are OK to plug in just one.

The extra USB end connected to the cable is for additional power supply. If for some reason the machine you are plugging into does not supply enough power to the external monitor you would plug the second end it to the machine and boost the power to the monitor.

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You need to check the power supply and see if the output voltage is correct, it should be written on the power supply board by the out put connector, if it is correct then it is possible that the inverter is bad.. I suspect a bad power supply.

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Power suppply will be the first place to look, look for caps with leaking/bulging tops.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, 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 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
http://www.badcaps.net

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Green light indicates the monitor is getting power. Nothing coming up on the screen indicates, No Signal.

No signal from the computer. This means the computer itself isn't working.

A bad power supply in the computer can cause this. A bad power supply is the leading cause of desktop computer failure. It is replaceable, and can be done by the owner relatively easy.

You may have a computer tower that the Power light comes on, you hear fan/s spinning, (Including the Power Supply fan), and it sounds like the harddrive is running.

ALL the lights in your computer use less than 1 Watt.
EACH fan uses 2 to 3 Watts.
A harddrive sitting there spinning in an endless loop, consumes about 2 to 3 Watts.

A Processor uses 51 to 125 Watts. Depends on what Processor it is.

A weak Power Supply will have enough power for lights, fans, and that harddrive sitting there spinning.
It won't have enough power to turn on the Processor.

[No processor operating, then the harddrive sits there spinning in an endless loop, because there is no processor to find the boot sector]

For a test, connect your monitor to a know good computer. See if it works.
Now connect that other monitor to your computer.

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hi , please change the signal cable which is connected from CPU to monitor. please rate this comment.

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Sounds like the internal power supply is bad. The clicking as a relay in the power supply. Try the monitor on another computer first and see if it works. Ray Compuguy44

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1 Answer

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