I can assure you i dont have a duff box , i have never had a problem before , worked
fine in Hong kong , Sydney ,Lhr.
Singapore is the first time i have never recieved any aircraft on the map ,tried it soon as i got home and worked again straight away with no problems.
I guess it will remain a mystery as to why it never worked in Singapore.
I took my computer along with all the wires , radarbox , ariel etc in my hand luggage ,ok i had to take my computer out but left everything else in the bag , not once was the bag searched at Heathrow , Hong Kong , Sydney or Singapore.
Ian