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Resolved Question

monitor says 'no signal detected' ...please help.

by Aug 11, 2011 1:52PM PDT

My son knocked over the tower on my PC and the monitor turned off. Now I can't turn it back on. It keeps saying 'no signal detected'

I have unplugged everything - plugged it all back in - even got a new monitor (an old one from a broken computer we had) and hooked that up - no good.
I tried a different cord.
I opened up the whole thing and cleaned it out. (although I suppose if anything was unhooked inside there I wouldn't know...)

Any other ideas?

THANKS FOR ANY HELP!!!

Discussion is locked

Tylula has chosen the best answer to their question. View answer
10 Posts
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Best Answer

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Test the monitor
by Aug 13, 2011 1:10AM PDT

It is probabally not necesssary, but it is a good idea to check the monitor on a second computer. If it works on the other computer, then it is very likely the video card.

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thanks
by Tylula Sep 14, 2011 9:58AM PDT

Thanks everyone! I couldn't respond before because I never did figure out how o fix it - everything inside looked fine - so we just got a new one Wink

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Answer
Recheck
by Aug 11, 2011 8:12PM PDT

If the PC was running, then not good. Its more of a system problem than a monitor one. The "no signal" simply is getting nothing to display. In fact seeing that display is a good sign the monitor is working. Now, you need to check the PC more closely for any obvious damage. You can't take anything for granted. Open case again and observe operation, "what is it doing" and are there any more beeps than normal upon boot-up?

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Answer
monitor says "no signal detected
by Aug 12, 2011 12:33PM PDT

I would suggest that because you have checked the cable between the monitor and the pc you have confirmed that the monitor is okay because you are getting the message that it is receiving no signal. I would unplug everything that you can including the power cord from any and all ends one at a time and plug them in again because I think your next move after checking for obvious damage is to take it to a technician. I am afraid it sounds like something is broken in the pc. May not be a big repair but may be it is. Hope it is just a broken wire. Good luck.

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Answer
Did you try...
by Aug 12, 2011 12:51PM PDT

Try unplugging the video board and plugging it back in.

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monitor became very light with lines running across it
by juanita nolan Aug 23, 2011 2:58AM PDT

OS Windows Vista Home Premium Compaq computer and monitor
I took the monitor to Best Buy (where I bought it) the guy said it is cheaper to buy a new one. Any answers?

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Answer
Several Possible Issues Here
by Aug 12, 2011 9:28PM PDT

The problem is could be damage to your video card; perhaps when the tower fell it damaged whichever receptacle on the back of your computer you have your monitor plugged into. Usually there are several, with most recent cards having at least a VGA and a DVI. If you just bought a new monitor you probably have the necessary cables to try using the OTHER one.

The impact of the fall may have caused the connection between your video card and your motherboard to come loose, or (and this is HIGHLY unlikely) caused the plug from the power supply to your video card to dislodge -- it would be the only wire running to the video card. Unplug everything, open your case, unplug the power connection to your video card, remove and reseat your video card and plug it back into the power supply.

If it still doesn't work you may need to replace the video card. If THAT doesn't work, try it in another slot (most motherboards have more than one PCI slot, which is probably what your video card uses).

If THAT doesn't work you may need a new motherboard, and it might be a simpler matter just to get a new PC.

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Answer
firmware
by Sep 18, 2012 1:11AM PDT

You may also try reinstalling the firmware for the concerned monitor.

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Re: firmware
by Kees_B Forum moderator Sep 18, 2012 1:25AM PDT

I've never seen a monitor that has the option to update it's firmware. Do you have an example of such a wonderful monitor?

Kees

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Not all that rare.
by r. proffitt Forum moderator Sep 18, 2012 2:08AM PDT
http://support.apple.com/kb/DL1453 is one of many I've encountered over the years.

But the story repeats. That is, why folk don't go to the maker's web page for such things continues to be a mystery.
Bob
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