hi not sure if im in right bit but need some advice ive recently brought a second hand pc for my girl to go in her room ive set it all up on desk and pluged all bits in where they should go as far as i no the hard drive starts up fine and runs but monitor says no signal when i switch it on and goes to standby it doesnt start up with hard drive like mine downstairs ive looked at connections all seem right only thing is with monitor there is a extra little light green cable attached to it that i presume fits in same colour at back but that stall doesnt make a diffrence ?? im stuck plz help thanks

Hi janey this light green cable is possibly sound?Or it possibly connects to VGA connector that plugs into back of computer the one on end of cable?

Have you tried the monitor in a diffrent computer?

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hi jellybean havnt tried it on another pc seems a lot of messing about but would make sence as for the the wire connected to monitor cable i dont no wot it is for ive got no instructions but noted down product no -ma-782k model 700p ? if thats any good to u ?

I had a HP 15 inch flat screen and I got no signal so I foned the guy who I bought it off and he said the thin blue cable plugged into VGA cable connector that plugs into back of PC.I had a look and there was a small port on the VGA cable connector so plugged in got signal.I had never heard of this before.

It makes sence to me however if there is not a port on the connection then it is for sound and plugs into your sound card at back of pc.

I would open up the computer give it a good clean and check graphics card is seated correctly unless it is onboard.Or try the link.Try monitor on another computer.Try another cable.

What colour is the light on the monitor?

Try pressing fn +f8 twice

Make sure RAM etc is seated correctly to as this pc has been moved around.

Any beeps on startup?

Or try this:HP and Compaq Flat Panel Monitors -  Flat Panel Monitor Displays Message about No Signal, Signal out of Range, Sleep, or Power Save 

ive sorted it jellybean rang the guy i got it off and told him it was in wrong socket it should of been bottom one instead of top so all ok now thanks for your help and fast response

Ahhh I was going to ask about another port lol.

Glad it is sorted janey.