What kind of power connectors does your K2 has? Metal or plastic?
Push/pull the connector to make sure it really fits correctly.
Does your K2 only has the problem that is does not start recording? Or do you also experience that some videos are corrupted?
Thanks for reply - I have checked all power supplies, they are good - I have updated firmware to the latest - different problem now - wont come on, then when i press power button, comes on then straight back off - any advice ?
So when you press the button, it comes up and stays on? But it does not reliably when you start your bike?
Sounds like there is a problem with the yellow cable or the switched power, to which it is connected to. The K2 uses the yellow cable to detect whether ignition is switched on or off. So if there is a problem (broken cable, loose conection), the DVR will think ignition is switched off and will shut down.
Please connect the yellow cable to the red cable at the battery. The DVR should start up then.
If it does and stays on, there is something wrong with the switched power source or the connection.
If it does not start, there is something wrong with the yellow cable or the power module.