Clio won't start

[willow]

I've got a Clio 172, just took the stereo out and put it back in and now nothing will work and it won't start, all ignition lights come on and stereo powers up but that's it. Any ideas what it cud be? All fuses are ok on side of dash and in engine bay

 

[willow]

Got it to turn over now and everything to work but it will turn over and then stops it self turning over, help???

 

[Jonff]

The red immobilizer light in the centre of the dash, does it go out once you've turned the ignition on?

 

[willow]

No it was staying on, but turn the ignition off and it would go off,
It's running now tho, my chap turned ignition on n off quickly about ten times then tried to start it and it's been fine since?