[Elecraft] K3 Stuck in MCU Load - SOLVED

[John_N1JM]

What was the answer? Didn't show up on the reflector.

John N1JM


Mike Cizek W0VTT wrote
> Many thanks for all the replies.  K8ZTT had the correct answer and I am
> now
> up and running again.  
> 
> --
> 73,
> Mike Cizek WØVTT 
> ________________________________________
> From: RIchard Williams [mailto:

> richarddw1945@

> ] 
> Sent: Saturday, September 29, 2018 19:21
> To: 

> mgcizek@

> ; 

> elecraft at .qth

> Subject: Re: [Elecraft] K3 Stuck in MCU Load
> 
> IF you are using the USB connection to the computer, you need to either
> switch to the RS 232 port and use that;  OR take the cover off the K3 and
> move the little slide switch on the KIO3B board to the opposite position. 
> You can then use the USB method.   After you have re-installed the
> firmware,
> move the switch back to the other position.
> 
> IF your KIO3B board does not have the small switch,  it is an older board
> and you have to use a RS232 cable.  Check with Elecraft, and they will
> probably switch boards to the newer one with the switch.
> 
> I had the same issue awhile back.
> 
> Dick, K8ZTT
> 
> Sent from Yahoo Mail on Android
> 
> On Sat, Sep 29, 2018 at 11:45, Mike Cizek W0VTT
> <

> mgcizek@

> > wrote:
> Greetings - 
> 
> I appear to have really #@(*)(*%&ed up my K3.  While updating the
> firmware,
> I accidentally hit either a key on the computer keyboard or one of the
> mouse
> buttons.  The K3 Utility window "grayed out" and the K3 is stuck in MCU
> Load, no backlight, TX LED flashing.
> 
> Setup: Astron 50A PSU; K3 # 2768 with new KIO3B board; direct USB
> connection
> to Lenovo Thinkpad running WIN7 Home Premium; K3 Util v 1.16.7.25. 
> Computer
> and K3 Utility both recognize the COM port; latest FTDI drivers installed.
> 
> Yes, I know there is supposed to be a cure for this, but it didn't work. 
> I
> tried:
> 
> 1. Restarting both the computer and the K3 a few times.
> 2. Remove & reconnect power supply from K3, hold POWER button to force it
> into bootloader mode. (which it is already in)
> 3. Factory reset (power on while holding SHIFT/LO button). Never got the
> EE
> INIT message.
> 4. Uninstall and re-install K3 Utility and try 1-3 again.
> 5. Uninstall and re-install front panel assembly; try 1-3 again.
> 
> K3 Utility is still trying to connect and the TX LED is still flashing. 
> Any
> ideas before I call tech support on Monday?  Thanks.
> 
> -- 
> 73,
> Mike Cizek WØVTT
> 
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