[Elecraft] [P3] P3 woes - internal display inop

[Dave New, N8SBE]

Alan,

Looks like I'll have to pack it up and send it in.

Thanks, Alan, for all your help and suggestions.

73,
-- Dave, N8SBE

On 2023-02-27 21:14, Alan Bloom wrote:
> Hi Dave,
> 
>> The internal display comes on briefly, then the P3 powers down. ...
> 
>> And no, I can't contact it via the utility anymore.
> 
> So it sounds like the CPU comes on briefly at power up but then turns 
> off.
> 
> There is a power-fail interrupt in the Microchip dsPIC33 CPU. Perhaps
> the +3.3V supply is not stable at power-up for some reason.
> 
> Actually, at this point it's really hard to troubleshoot without
> seeing the unit.  If you send it in to Elecraft for repair, the
> service tech could try swapping PC boards to isolate the problem. For
> example, if a new rear-panel I/O board fixes it, then it is probably a
> power supply problem.
> 
> So at this point, sending it in is probably the best option.  You can
> send an email to k3support at elecraft.com to explain the problem and get
> a return authorization.
> 
> Good luck!
> 
> 73,
> 
> Alan N1AL