well after more than a week of correspondance with logitech they have decided that as i suspected my unit is faulty
now here is the upsetting part
as i was the second user to use the remote online and even though the unit is less than 1 year old they wont give me a free replacement as thay will only cover the unit for faults with the original purchaser.
in my opinion this seems just like a cop out by logitech and anyone looking at buying a used one should think again
i have just bought a new car (new to me) and the original warranty is still valid and will still be if i sell the car on again to another person.
Ive also just sold my old tv and the remainder of the 5 year warranty has been transfered to the buyer.
logitech must know that thier units are of bad build quality you just have to look at their
own forums and i can only assume that adopting the first user only policy save them money in replacing products that are less than a year old.

DO NOT BUY A USED HARMONY REMOTE AS THE WARRANTY WILL BE VOID THE MOMENT YOU GO ON LINE WITH IT