[Elecraft] P3 Firmware Checksum failure

[Nick]

The same here, no SVGA card installed but I didn't
check MCU box (loaded full set). No problem with upgrading at all.
It may happen check sum test failed as you loaded MCU only.

73, Nick VE3FJ


On 1/19/13 3:32 PM, Paul M Dunphy wrote:
>     I decided to upgrade my P3 to the latest beta firmware.  I'm using 
> the recommended utility 1.12.10.4 on COM4: at 38400 bit/s.
>
>     I tried numerous times with the 1.24 MCU firmware (I don't have 
> the SVGA option, so I just selected the 1.24 MPU box.)  It seems to 
> load (blue progress bar on the utility program as well as a progress 
> bar on the P3's screen.)  However, as soon as it finishes, I get on 
> the P3 display:
>
> P3 BOOT LOADER
> CHECKSUM TEST
> FAILED CHECKSUM
> READY FOR DOWNLOAD"
>
>     I tried power cycling the P3 and also both the P3 and the K3 (as 
> this has seemed to cure problems for others.)  However, I always got 
> the above error.  Thinking it might be something with 1.24, I tried to 
> put 1.20 back.  It behaves exactly the same . . . appears to load as 
> indicated by the progress bar on the program and the P3 screen, but 
> then it gives the same error above.  I've somehow managed to make the 
> P3 nonfunctional.
>
>     I'd be happy to get it to work with 1.20.   My K3 still works 
> fine, and the "Test Communications" button on the P3 utility program 
> succeeds with "P3 waiting for firmware load. RS-232 speed 38400 bit/s" 
> message.
>
>     Any suggestions?
>
> 73, Paul VE1DX
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