Christmas Lights (Belmont TN35)

Some Christmas lights as follows:
16m length of pink 200 LED lights. Bought from Blackbrooks Garden Centre as ex-display. Can't get them to work properly. They flicker on but there may be a loose connection somewhere. I'm sure someone technically minded could fix them to save them from landfill.

ALSO: a short string of white bulbs and two strings of Moroccan lights ~ all battery powered.