[Elecraft] K3 LEDs light up, but won't come to life

[Guy Olinger K2AV]

Just covering some bases...   Put an AC voltmeter on the DC leads from the
switching supply and make sure any AC voltage is way way down in the
millivolts. Light load, heavy load, no load.   73, Guy.

On Tue, Nov 23, 2010 at 6:44 PM, Mike Harris <mike.harris at cwimail.fk> wrote:

> Yes.
>
>
> ----- Original Message ----- From: "Guy Olinger K2AV" <
> olinger at bellsouth.net>
> To: "Mike Harris" <mike.harris at cwimail.fk>
> Cc: <elecraft at mailman.qth.net>
> Sent: Tuesday, November 23, 2010 6:28 PM
>
> Subject: Re: [Elecraft] K3 LEDs light up, but won't come to life
>
>
> Is that what you read on the K3 front panel display?
>
>
> On Tue, Nov 23, 2010 at 4:20 PM, Mike Harris <mike.harris at cwimail.fk>
> wrote:
>
>> 13.8V from an Alinco DM-330MW switcher
>>
>> Mike VP8NO
>>
>> ----- Original Message ----- From: "Guy Olinger K2AV"
>> <olinger at bellsouth.net>
>> To: "Mike Harris" <mike.harris at cwimail.fk>
>> Cc: <elecraft at mailman.qth.net>
>> Sent: Tuesday, November 23, 2010 6:04 PM
>> Subject: Re: [Elecraft] K3 LEDs light up, but won't come to life
>>
>>
>> What is the power supply supply voltage? 73, Guy.
>>
>> On Tue, Nov 23, 2010 at 3:58 PM, Mike Harris <mike.harris at cwimail.fk>
>> wrote:
>>
>>>
>>> Hi,
>>>
>>> I've started to notice this in the past couple of months. I turn
>>> the PSU off for a few seconds, then back on and all is OK. It has
>>> happened maybe a dozen times.
>>>
>>> Regards,
>>>
>>> Mike VP8NO
>>>
>>> ----- Original Message -----
>>> From: "Eric Rosenberg" <ericrosenberg.dc at gmail.com>
>>> To: <elecraft at mailman.qth.net>
>>> Sent: Tuesday, November 23, 2010 5:49 PM
>>> Subject: [Elecraft] K3 LEDs light up, but won't come to life
>>>
>>>
>>>  thi has happened three times:
>>>>
>>>> I turn on the K3, the LEDs on the four knobs under the display
>>>> light up, but
>>>> the display stays dark and I cannot power it off with the power
>>>> button.
>>>>
>>>> I have to disconnect the power, wait a little bit and re-connect
>>>> the radio.
>>>> It comes back to life when I power it on.
>>>>
>>>> What's happening?
>>>>
>>>> Eric W3DQ
>>>> Washington, DC
>>>>
>>>
>