KX3 Firmware update trouble

[Dave Sublette-2]

We were doing a firmware update (my son and I). All went well until the KX3
became stuck in the MCU LD condition.  We followed the manual instructions
(several times).

The KX3 is still stuck and the computer cannot find the KX3 port.  The
computer recognizes the cable, but communications fail with the KX3.

We have rebooted the computer and restarted the KX3 utility without
success.  The Kx3 utility is the latest.  We successfully downloaded it and
installed before we started.

What can we do next?

Dave, K4TO
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[Bob N3MNT]

Have you tried this.
If you accidentally load an old or incompatible
firmware version and find the KX3 unresponsive,
do the following: (1) Unplug the KX3 from the
power supply. If internal batteries are installed, also
remove one battery. (2) Plug a power supply in (or
reinstall the removed battery). (3) hold the KX3’s
BAND- and ATU TUNE together for about 10
seconds, after which you’ll see the TX LED flash
(you’ll also see MCU LD on the LCD). (4)
Connect the KX3 to a computer and run KX3
Utility, which will load new firmware.



--
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[Bob N3MNT]

Have you tried this.
If you accidentally load an old or incompatible
firmware version and find the KX3 unresponsive,
do the following: (1) Unplug the KX3 from the
power supply. If internal batteries are installed, also
remove one battery. (2) Plug a power supply in (or
reinstall the removed battery). (3) hold the KX3’s
BAND- and ATU TUNE together for about 10
seconds, after which you’ll see the TX LED flash
(you’ll also see MCU LD on the LCD). (4)
Connect the KX3 to a computer and run KX3
Utility, which will load new firmware.



--
Sent from: http://elecraft.365791.n2.nabble.com/
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[Dave Sublette-2]

Dick and list,

We have successfully updated the firmware for the DSP and the MCU.  The
problem occurred as we were trying to install with the KXPA100 in line.  I
removed it and connected the computer directly to the KX3 and all went
well.  Later, we were able to connect the KXPA100 and confirmed that the
KXPA100 has the latest firmware.

Thanks to Dick and all of you who monitor this list and contribute support.

73,

Dave, K4TO

On Sun, Mar 24, 2019 at 5:10 PM Dave Sublette <[hidden email]> wrote:

> We were doing a firmware update (my son and I). All went well until the
> KX3 became stuck in the MCU LD condition.  We followed the manual
> instructions (several times).
>
> The KX3 is still stuck and the computer cannot find the KX3 port.  The
> computer recognizes the cable, but communications fail with the KX3.
>
> We have rebooted the computer and restarted the KX3 utility without
> success.  The Kx3 utility is the latest.  We successfully downloaded it and
> installed before we started.
>
> What can we do next?
>
> Dave, K4TO
>

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