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There should be two live feeds to the radio. 1 is a permanent 12v feed and the 2nd is an ignition 12v feed. You also need to check the earth is a good connection.
If you have both feeds and a good ground then the radio is faulty.
hi mark, radio worked fine before battery being disconnected and recharged after long holiday, both live feeds ok good earth, is there a separate cut off device for the anti theft device on radio.
It should still power up so you can input code. If it doesn't power up then either you are missing a supply, an earth or it is faulty. Regardless of whether it worked before or not.
have checked both power input and earth by multimeter its fine just seems strange that now it wont work,maybe i can borrow similar radio from local garage to try system.
If you are sure you have good supply voltages and earths, then the radio must be faulty.