[Elecraft] K3S stuck on MCU LD

[Nr4c]

Verify connections to computer. 

Maybe I’m plug everything but cable to power,  computer and ant and try again. 

Sent from my iPhone
...nr4c. bill


> On Nov 14, 2019, at 9:59 AM, Don Pomplun <radioprincegeorge at gmail.com> wrote:
> 
> A few days ago I noticed that when I powered up my K3S (ser #11141) I would briefly get an Err DSE message.  The manual says I should reload the firmware via the K3 Utility program (like I've successfully done in the past when a new version is available). But this time when I click Send All Firmware to K3, I get this:
> 
> Elecraft K3 Utility Revision 1.16.7.25
> OS Version 6.1 Build 7601 Windows 7
> K3 MCU revision ??.??. RS-232 speed 38400 bit/s.
> Sending firmware file C:\Users\K2BIO\AppData\Roaming\Elecraft\K3 Firmware\hmcu0567.hex to MCU
> /(5-10 second pause, then)/
> Error code 0xE2000048: No response to poll while synchronizing to buffer boundary
> MCU verification failed. Reload MCU.
> Click "Close" to close this window
> 
> I disconnected the Power Pole connector for a few minutes, then powered it up again.  After the front panel LEDs flash briefly, the screen says MCU LD and the red TX light is flashing. Trying this again many times, I get the same message.
> Then I noticed that with _no power to the K3S and the USB cable between the K3S and the PC unplugged_ at both ends, when I start the K3 Utility, and click /Send All Firmware to K3/, I get exactly the same error message as noted earlier (with nothing connected).  Thinking maybe the problem is with the K3 Utility, I deleted it from the PC and reloaded it from the Elecraft site and reinstalled it.  Same problem!
> It appears that even after a long power-down, the K3 processor isn't resetting.  Looking for suggestions!
> TIA
> Don    K2BIO
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