Monitor says no signal detected?

I have recently sent my computer to a guy who installed a new graphics card now my monitor will not turn on it is in standby mode and says no signal detected i have tried the computer on another monitor and is says the same thing. has anyone got a solution or had this problem? if so could you please help me out? many ta's
Monitor says no signal detected?
have you pluged the monitor into the wrong port?


have you tried to shut everything down and restart ?
Monitor says no signal detected?
sounds like the cable from your monitor is stuffed,


Try making sure it is firmly seated at both ends.





Sorry, re-read your question _ I thought you tried your monitor on a different PC, not the other way around.





Peter (below) is correct with his answer.
Reply:It could be that the graphics card wasn't installed properly, it may just need reseating. Otherwise you may have conflict with the resolution settings of the card and the monitors you have tried. Ask the guy that fitted the card to sort it out..
Reply:have you tried detecting a signal
Reply:I had this problem ... take the monitor plug out of the computer and plug it into the next port along?
Reply:how are you able to know your on the net lol
Reply:if you have on board graphics make sure you havnt plugged it into that slot.


does your computer sound like its booting up without you able to see whats going on onscreen?


take the side off your tower and push the graphics card in, maybe the guy didnt screw it in so its falling out of the slot.
Reply:Check the port is the correct one, by that I mean the big socket on the gfx card. If you have an onboard GFX card as well you will have more than one port in more than one place (The add on card and the on board which your PC might have had in the first place.)





Most modern gfx cards also have more than one port for multiple monitors. So check that as well.





The next more tricky bit is possible, especially if you have a card and on board gfx. The PC reads GFX from where it is told to go BIOS does that bit, which means it might not know about your GFX card yet so you need to consider BIOS settings.





BIOS, this tells your PC many things, one of which is what graphics card to pay attention to.





You will need to enter Bios. Turn it on and press "delete" when it says "press delete to enter setup."





Then look for a setting that says something like "AGP" or "Graphics". Usually under the advanced settings tab. (It all depends on which Bios you have as to where it is)





There will be a pull down menu if you have on board graphics and you should make sure it doesn't point to the onboard graphics. Saving the change afterwards.





Be careful BIOS is the critical bit of your PC, any mistakes should be exited without saving to be safe.





If unsure take it back and have him check it out.