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LCD MoNITOR no Signal

Hi,

I just turned my monitor off to let it cool. When I turned it on the next morning it says "no signal". I waited a couple of days and see if it works, it is still saying "no signal". I tried plugging it in on my friend's CPU and it worked fine. What seems to be the problem?

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The problem lies with your video card. The fact that it worked on your friends computer proves that it is not your monitor. Some motherboards have two video adapters. One on a video card and one on the motherboard. You need to open your PC case and see if you have one or two. If you have two then you can try the other one. Otherwise, replacing the video card will correct it. However, if the only video adapter is the one connected to your motherboard then the motherboard has to be replaced. If you have any questions let me know.
Please vote on this solution before logging out.

Posted on Feb 05, 2009

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Vsonic flat screen monitor need blink codes


hi do you mean you are asking for the blinking codes on your viewsonic pc monitor?. usually lcd monitor for pc has no blinking codes, if your monitor just only a blinking indicator and won't turn on, you must check first the source from your pc if their is a signal to turn on the monitor. if just blinking only then won't turn on you must check the power supply of the monitor usually the main cause is bulging capacitor. just replace it with the same value and rating thanks for consulting the fixya good luck.

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Hi to all, can you help me guys, i am having a problem with my Lcd monitor AOCTFT1560ps, my screen turns black after a few seconds and my OSD was locked..... HELP ME GUYS!! thanks


This link may help. You can try to do something if it is connected to a computer. If not, you can disconnect the video cable from both end and wait for 5 minutes and reconnect it. After your monitor wake up, use your OSD to disable sleeping mode, hiberation mode or turn off monitor mode within power options.

Nov 03, 2010 | Computers & Internet

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Just received Refurbished Advent CBE 1401. It is being replaced because power switch is faulty - but I have questions about machine. 1. When initially switched on the switch turned red is this normal? I...


1) No. The switch color should have been Green

2) No Signal on the monitor, indicates the monitor is not receiving a Video Signal from the computer.

A) Could be due to a faulty monitor cable.
Monitor cable is used on a working computer for a test,
Or,
working computer's monitor cable is used on the Advent for a test.

B) Could be due to the graphics 'engine' on the motherboard, or on the graphics card is bad.

[Graphics 'engine'.
GPU
Graphics Processing Unit.

http://en.wikipedia.org/wiki/GPU ]

If the computer is using Integrated Graphics, the GPU is on the motherboard.

(Integrated Graphics is also referred to as OnBoard Graphics. Meaning On the motherBoard)

You will know if it's Integrated Graphics, because the monitor cable will be plugged into the VGA connector, on the motherboard

http://en.wikipedia.org/wiki/VGA_connector

Since you indicate an adapter was included, to adapt to a different port (Connector), it could be a VGA to DVI adapter, or a DVI to VGA adapter.

Your monitor may just have a VGA connector on the monitor cable.
Hence you would use a female VGA to Male DVI adapter.

Your monitor may be an LCD flat screen monitor, and has a DVI connector on the monitor cable.
Hence you would use a female DVI to Male VGA adapter.

DVI
Digital Visual Interface

http://en.wikipedia.org/wiki/Digital_Visual_Interface

VGA monitors are Analog.
LCD monitors are Digital.

A computer puts out a digital signal.

If a VGA monitor is used, the computer has to alter the Digital signal to an Analog one.
This slows down the video signal.

If your monitor (In any case. Not just this one), is an LCD flat screen monitor, it is best to use a DVI monitor cable, and plug into a DVI port on the computer, if available.

If your monitor is a VGA (CRT. Cathode Ray Tube), monitor, and you have a DVI connection on your computer, using the adapter will do you no good.

The adapter just uses the contact pins for VGA, that are present in that DVI adapter, and hence the DVI connection on the computer.

You're still just getting an Analog VGA signal.

Example of a female VGA to male DVI adapter,

http://www.directron.com/dvi.html

If the Integrated Graphics are suspected to be bad, a graphics card is used in the appropriate expansion slot, for a test.

If the graphics work then, the graphics card is left in service.

After I test the monitor cable my next procedure is to suspect the Power On switch, or the Power Supply, and go to the graphics next.

The reasoning is that Power Supply failure, is the number one cause of computer failure.
The next is the Power On switch, then Electrolytic Capacitors used on the motherboard.

(Specifically, any Electrolytic Capacitors used in the motherboard Voltage Regulator Circuit)

If the Power On switch is bypassed, the diagnosis will reveal if the problem is the switch, or Power Supply.

Bypass the Power On switch, and the Power Supply comes on?
Problem is the Power On switch.

[One Power On switch I have found to fit a lot of computers. The Power On switch goes into the plastic Power On button,

http://www.directron.com/atxswitch.html ]

Bypass the Power On switch, and the Power Supply does Not come on?
The problem is the Power Supply.

The Power On switch is bypassed using a jumper wire, from the green Soft Power On wire, to ANY black Ground wire. The contact made is a brief momentary one.

The jumper wire is used at the back, of the 20, or 24-pin ATX main power cable connector.

To be continued in an additional Comment.


Jun 04, 2010 | Computers & Internet

1 Answer

Lcd monitor won't turn on


Hi,

the fact that there is no picture it doesn't mean that the lcd monitor wouldn't turn on or would be faulty.

It means that the monitor is not getting picture from the computer, the cord could be loose or the computer has a problem and its unable to start up or send signal.

you can try the monitor on another computer that works, to find out if the display works fine.

if the display works fine then the problem is the computer not turning on or starting up, if there is a fault or error you should hear beeps, the lack of beeps may also be a sign of a fault or a error.

What you can do is, unplug the computer for 10 minutes and try turning it on again, reconnect the display cable and try again.

Do you have a screwdriver and is the computer covered with warranty or not? if the computer is on warranty better not to get inside, just contact your dealer and get it serviced.

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1 Answer

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Its not getting a signal from your video card or onboard video.

Are you connected by a VGA cable or a DVI Cable. Or does it have an adapter from VGA to DVI?

Check and see if the moniotr it set to DIGITAL instead of ANOLOGUE. If so, switch to the other.

If you press the monitor settings buttons, does anything show like options to adjust contrast?

If so then it most likely your computer.

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1 Answer

PC or monitor, signal problems


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