Hi all, basicly i brought a new stereo for my octavia , plugged it in , fine , unplugged it to fit it in properly , got it all sorted , plugged it back in and nothing, every now and then it will flash , just like the fuse has gone , but checked the fuse on the back and its fine , is there another fuse in the fuse box for the stereo ??? tried putting old one back in as well and that is completly dead as well???? any ideas ??

Sounds like you've pinched a cable somewhere, if it was the fuse you wouldn't get a flash of life every now and then.

Sounds to me like something has gone loose. Like a plug isn't all the way in. Easily of pulled something out when sliding it back in.

tried it again with the stereo out again , so nothing could get nudged out or anything , still not working :( im guessing its going to be either the earth or the power cable iv pulled out or broken , is there an easy way to test the cables ??

Not got one of the cables mixed up? in the vRS there are three connectors

I could start by checking the ISO connectors for earth, +12v perm and +12v ignition/switch.

If you have a multimeter it will be easy, eitherwise a 12v bulb with some wires soldered onto it and use them as your probe wires.

There is also a fuse for the radio in the main fuse box, I think I blew mine (blue) when I was fitting my Parrot, as something shorted out the mobile phone charger which was plugged into the fag ligher (so check that socket works before going too far with other investigations).

to add even more fustration, checked the radio fuse , that was fine , checked with a multi meter, there is still power coming through , any more ideas??? also i do have 3 connectors , however guessing one is power input and earth etc. other one is speaker cables and then the 3rd one is the 6Disc changer in the back. so have plugged in the two that fit in the connector. which is the power one and speakers. stereo still dead :(

Is there two lives? Should be one constantly live and one that's switched off the ignition.

Is there two lives? Should be one constantly live and one that's switched off the ignition.

That is correct.

3 plugs:

- Power (ground, +12v perm, +12v ign, and some others)

- Speakers

- CD Changer link cable

will have a check of the other connection , the ignition cable , if thats fine any other ideas ?? cant see it being the cd player as this is now the 3rd one iv tried including the original one, so any ideas would be brilliant cheers for the help already

If you have power coming through to the back end of the ISO connector for the HU, then that must must suggest the HU is at fault. Now that does sound odd if you have tried 3 HUs.

Have you confirmed you have the the two different +v12v feeds, and a valid ground in the plug. I know it sounds like I keep suggesting the same thing, but I think that you need to 100% confirm that the power is correct.

Also remember that some HUs can inject power back to the K-line (iirc) which can then cause vagcom and the like to throw a wobbly.... (search for more info, as I can't remember it!)

Right will be pleased to know have finally sorted the problem , to my amazment it was the head unit, tried it in a mates car and nothing , tried the original HU and nothing as well , all sorted now though, worse easy job iv ever had ahaha cheers for all the help guys