[Elecraft] P3 Failure, and question

[Dave New]

  Do you know just what failed on the I/O board?  Was it possibly due  
to static discharge?

I tend to leave an antenna connected, except during active weather,  
but curious if there is something sensitive in the P3 I/O area that  
can fail easily from a surge, like the old RS-232 circuitry in the  
original K3.

Thanks,

-- Dave, N8SBE

Quoting Howard Saxion via Elecraft <elecraft at mailman.qth.net>:

> I had a similar problem with my P3 with SVGA. I had to cycle  
> through the on-off switch a few times before it would fully power  
> up. Once powered up, everything was working and stable.  I tried  
> reseating the ribbon cables but that had no effect.
>
> I contacted Elecraft technical support and they had me try a few  
> things but that did not solve the problem. I sent it to Elecraft and  
> it turned out that the I/O board was faulty. The repair cost was  
> approximately $200 for a new board and labor.
>
> 73
> Howard/WX7HS
>
>> On Apr 12, 2021, at 06:05, Dave Cole <dave at nk7z.net> wrote:
>>
>> Rick,
>>
>> Thank you!  I appreciate the datapoint in this.  I was just looking  
>> over the schematic and came to the same conclusion...  It looks  
>> like a backlight problem to me as well...  I tried to find a  
>> datasheet on teh 4538 IC that appears to control it, but alas,  
>> nope.  I got mine to come back on by power cycling it as well...
>>
>> Hopefully someone has actually fixed this, and knows which cap...
>>
>> 73, and thanks,
>> Dave (NK7Z)
>> https://www.nk7z.net
>> ARRL Volunteer Examiner
>> ARRL Technical Specialist, RFI
>> ARRL Asst. Director, NW Division, Technical Resources
>>
>>> On 4/12/21 5:27 AM, Rick Stanback wrote:
>>> My P3 does the same thing.  If i keep cycling power it eventually comes
>>> on and works.  I suspect there is a bad capacitor in the LCD backlight
>>> power.  I have not actually looking into it yet.
>>
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