Rear entertainment not powering up

[Topcat]

Well after  the purchase of my 2008 x5 and finding out the DVD player doesn't read on the rear entertainment system,got it fixed for a high price for £450 inc vat, plugged everything in and  tried out with DVD and the PlayStation 2 before mounting back into the centre consol,every thing was working fine so installed back into place,got everything finished ,switched on but now all dead,screen and DVD player,hope it's just a fuse but don't see why it should have blown any fuses as was working okay before putting it back in consol

[Topcat]

It was 5 amp fuse in rear