When inserted, try 'rotating' them - this can sometimes clear the contacts at each end. Also, check the obvious: check the batteries are the right type. check the batteries are in the right way round. check they're not already dead (try NEW new batteries). Hope this helps!
Answers & Comments
When inserted, try 'rotating' them - this can sometimes clear the contacts at each end.
Also, check the obvious:
check the batteries are the right type.
check the batteries are in the right way round.
check they're not already dead (try NEW new batteries).
Hope this helps!