And be really sure that the subaudible tone is turned on.  Make a 
schedule with a somewhat close ham and try a simplex contact, both 
with the Kenwood and your other handheld - see if both have about the 
same signal strength.  Listening right next to the transmitter can be 
deceiving.
Contrary to what John said, I have read notes from people who have 
praised Kenwood in VA.  Personally I have had no dealings with any 
Kenwood service facility.
Good luck.
Pat, K9JAUAt 09:49 AM 4/1/2006, you wrote:
>Have you done a complete reset?  There are three levels of reset, but
>the first couple may not do the trick for you.  Try the complete
>reset if you haven't.
>
>At 11:53 PM 3/31/2006, you wrote:
> >is your battery supplying enough amperage to put out the full 4 or 5 watts
> >on high power?
> >Is there a way you can hook it up to a regulated power supply and see if it
> >then works?
> >Also, you weren't clear in another message as to weather you could receive
> >your own signal on the repeater input frequency using another radio?
> >Could you hear your own audio on the simplex side?
> >Try a test using a simplex frequency like 146.430, set both the th-f6a and
> >another receiver on those frequencies, insure that the simplex shift is on,
> >or at least, no shift, and see if you can clearly hear yourself on the other
> >receiver.
> >If so, then the radio is probably transmitting, but isn't transmitting
> >enough power to hit the repeater.
> >73
> >Colin, V A6BKX
> >----- Original Message -----
> >From: "Matthew Chao" <[log in to unmask]>
> >To: <[log in to unmask]>
> >Sent: Friday, March 31, 2006 7:11 PM
> >Subject: Malfunctioning THF6A
> >
> >
> > > Hi, Folks!  I seem to be having trouble getting my THF6A into
> > > repeaters.  I've reset the rig a few times, checked the input freq
> > > and repeater freqs, get a carrier on the input, but can't get into
> > > any repeaters.  I've reprorgammed the rig both with the data cable
> > > and manually, but no luck.  Any ideas?  How good is Kenwood at fixing
> > > my rig in terms of time?  How do I get it fixed?  thanks.--Matt.  (N1IBB)
> > >
> >
> >
> >
> >--
> >No virus found in this incoming message.
> >Checked by AVG Free Edition.
> >Version: 7.1.385 / Virus Database: 268.3.4/299 - Release Date: 3/31/2006