No signal

Hi, I cannot get my pc to start. Each time I put it on, it says, "No signal, then power saving mode". The power button is green then it turns to orange. Can you help me please? I would appreciate some feedback on this issue. Many thanks.

I assume from your description that it is a desktop, not a laptop. The "no signal" indicates that either the base unit is not starting, there is a fault on the video card, or the video lead is disconnected. Check the connections are tight, try removing them and reseating the wire. Check the base unit, does the light come on? Does it make any sound, typically one or more beeps. The number of beeps should indicate the cause.

Dear Alan, Thanks for your reply to my desktop problem. I will check the video card. I have checked all the cables but I will check them again to ensure that they are tight. The light comes on in the base unit and I can hear the fans whirling. Thanks for your support.