? My Ft 480 has developed a odd fault ..

when first turned on from cold rx works fine, but set will not go to tx
when mic pressed-in all modes- (or cw key) wait about 30 seconds with
mic/key pressed - then it go's to tx and works fine

from cold, there is no click from the t/r relay .. once it had wored ,
keeps running fine .. any one seen this before ? ... i assume its may
be a relay .. but that dont explain why there is no responce at turn on
?

Tnx

G ..