Lpc2000

I haven't given up diagnosing this, but I thought I'd see if anyone else
has ever seen it..

I power on an unprogrammed LPC2106 on a new target board we're bringing
up, pulling P0.14 low and leaving DBGSEL unconnected.  I then send it a
'?' through its console port at 9600,N,8,1.  The chip echoes this back
to me for about the 1st 10 keystrokes or so, then quits and starts
cycling its UART0 TX pin from high to low about every 5 seconds.
Pushing the reset button starts the whole cycle again.  When it's in
"echo mode" it will actually echo any character back, when it's moving
its TX pin between 0 and 3.3 volts, there is no communication at all
that I can tell.

Deja vu, anyone?  Or is this my own personal alternate reality?

Thanks,

James Dabbs, TGA