[Grom]

Hi there,

Yesterday I took the battery and charged it at home, it took like 30 minutes and it was already full (it is in a good condition and new). Today I was mounting it back and whenever I connect the second cable (it doesn't matter the order) it starts to do a strange sound that never ends. If I put the key in, the LCD remains black. I don't know if it's some kind of protection to prevent it of being stolen of something like that... Can anyone help me?

Thank you in advance.

(Sorry about my english but it's not my lenguage)

 

[JohnB]

You probably have the +ve and -ve poles of the battery mixed up. Check if you have blown the main fuse after installation.