http://elecraft.85.s1.nabble.com/P3-SVGA-Beta-Firmware-1-24-1-14-Now-Available-tp7568882p7568946.html
check MCU box (loaded full set). No problem with upgrading at all.
> 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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