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Flat screen monitor comes up with No Signal

Our flat screen monitor goes "dead" and says "No signal". this happened before, and we swapped it for another one for a couple of weeks, then reconnected it and it was ok. Now it has happened again. Turned the computer and monitor off and on again a few times without any success.

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If it goes to NO signal again, its not necessarily the whole Flat screen that is dead. Just replace the Video logic board with a known good one and it should work

Most monitors only have 2 or 3 boards
Logic board, Inverter, Power supply
or Logic video ,and a power supply board with an embedded inverter.

You have to open the monitor and replace.



Posted on Sep 14, 2008

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1 Answer

Over Range Signal


OK, you need to boot up in safe Mode, then change your screen resolution, to say 800x600, or 1024x768, this will then allow your monitor to operate, IF this doesn't work, then you will have to swap out, the Monitor and VGA card to find out which one is faulty.

May 22, 2010 | Star Logic 17" LCD Monitor

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Screen says check signal cable - have check my cables....


Not really...

First check if the cable connected from the monitor is secured and properly connected to the video card of the CPU.

"Check signal cable" will only be display if there is no signal coming from the CPU.. that signal Passes through the video card..

Check the status of your video card.....and see also if the CPU is working and not dead set.

Hope this help...
Much appreciated if you rate this help.. thanks

May 21, 2010 | Samsung Syncmaster 730B 17" Flat Panel LCD...

1 Answer

No input signal


that is the problem of cpu not a monitor to confirm disconnect signal cable and power on. monitor will show "no signal check signal cable" it means that monitor is ok and fault lies in cpu .then open the cpu and disconnect ram and listen the beep. contineus beep should be heard then ram is faulty replace it. if no beep heard then motherboard is faulty .

Mar 08, 2010 | HP vs17

1 Answer

No signal pops up on the screen


make sure your cables are tight. make sure you have the correct input selected on your monitor. swap your monitor on the pc with one from a freind that works. this rules out your graphics card and the pc. if all of these are correct you probably have a bad video input on the monitor. you may need it repaired.

Dec 25, 2009 | Acer 22" X223w LCD Monitor

1 Answer

Screen comes on says Acer then No Signal, and goes out. if shut power off and then back on get same result.


This means the monitor believes it's not connected to the computer. Verify the cables first of all. Then try booting in safe mode (F8 key at PC startup) in order to verify that the PC is sending data to the proper video port (you might have a dual VGA / Digital output, for example, and the monitor might be connected to the wrong PC port). Quite often, a "bad signal" will be the same of "no signal"; and you can have a bad signal if the monitor resolution on the PC is set too high. This could happen if you installed a high-resolution capable monitor, and then replaced it with a not-completely-plug-and-play, lower resolution one. The PC would keep sending hi-res signals to a monitor which can neither interpret them, nor tell the PC "please slow down". To check this last possibility, reboot your computer while the monitor is ON. When PCs reboot, they usually drop back to standard VGA signaling, which all monitors understand. If the monitor abruptly comes to life and displays a boot screen, then goes No Signal again after several seconds, you've got a resolution issue; get in Safe Mode with F8 key at boot, and modify the screen properties (right-mouse button on the desktop, then Properties).

If everything else fails, try also connecting the monitor to another PC or laptop, to see if it works there.

Dec 04, 2009 | Acer AL2223W 22" LCD Monitor

1 Answer

Lg flatron blank screen


t certainly seems like the monitor is not getting a signal. Did this happen after you changed something, or just on normal boot up?
It could be the video card that has failed.
Also, check the pins on the connector; sometimes they can get pushed in.
If you can, try swapping out the video card or use the monitor on another computer.
Good luck,

May 09, 2009 | LG Flatron L1951S 19" LCD Flat Panel...

1 Answer

Sony LCD flat screen monitor


t certainly seems like the monitor is not getting a signal. Did this happen after you changed something, or just on normal boot up?
It could be the video card that has failed.
Also, check the pins on the connector; sometimes they can get pushed in.
If you can, try swapping out the video card or use the monitor on another computer.
Good luck,

May 09, 2009 | Sony SDM-HS95P/B 19" LCD Monitor

1 Answer

Monitor comes up shows "acer" then says no signal and goes black


This Problem is Acer(s) Monitors. Though it is a nuisance one fix That has work for many is the Unplugging after it goes back to Good (viewable) screen.
I have hooked mine up to an inexpensive Power strip to make it easier for me and just turn off at time indicated above and Viola Simple is as Simple does :)

Apr 24, 2009 | Acer X241Wsd Monitor

1 Answer

INPUT SIGNAL OUT OF RANGE


some how your screen resolution has changed above or below what your monitor can display. you need to boot your computer using another monitor that can work with the resolution your computer has switched to(i used a spare crt monitor when it happened to me) change your resolution in display properties to a normal level like 1027x768, and while the computer is on swap the monitor cables to verify the lcd is working.
It is perfectly safe to unplug the video cable and plug it back in while the computer is turnned on.

Dec 26, 2007 | Relisys TL775 17" LCD Monitor

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