[Elecraft] P3 gone BLACK

[Dave New]

  Allen,

I have this issue with my P3, and it seems to be related to internal  
(to the P3) power rail problems.

I have the SVGA adapter, and the external display always works, even  
if the P3 display isn't.

After leaving the power on for a minute or less, I can quickly toggle  
the power button on the P3, and then the internal dispaly comes up.

The theory is that during initial power on, the power rail comes up  
too slowly to get a clean power-on reset to the internal display  
controller.  Note that the P3 has been working fine for me since I  
purchased the kit about ten years ago.  This is a recent issue,  
showing up about a year ago, as far as I can tell.

Some suggestions have been to replace one or more power supply  
capacitors assuming they've become flakey, or to plug the P3 power  
into the station supply, instead of the 12VDC output on the back of  
the K3s (assuming that the 12VDC output is weak or slow to rise during  
K3s power on).  I've not tried either of those solutions, preferring  
to just mitigate the issue by toggling the power, which doesn't happen  
very often, because I tend to leave the rig on most of the time.

Hope that helps, and 73,

-- Dave, N8SBE

Quoting n5xz at earthlink.net:

> My P3 screen has gone black. When I plug in the power, I still hear some
> very quiet relay click.  Any quick ideas?
>
> Full disclosure: I suffered a voltage spike some time ago which took out my
> K3 some time ago (it is at Elecraft now); P3 still operated but the POWER
> switch no longer worked, i.e. it was on all the time whenever power was
> applied. (I am borrowing a K3 from a very, very good friend).
>
> Does anyone work on P3's besides Elecraft?
>
> Allen R. Brier N5XZ
>
> 1515 Windloch Lane
>
> Richmond, TX 77406
>
> 713-705-4801
>
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