Sounds like the IOIO is in a reboot loop of some sort, possibly due to
firmware corruption. Have you tried an upgrade recently? Do you have access
to an Android version <4.1, so you can attempt a firmware update using
IOIOManager?
On Dec 16, 2013 5:48 PM, "Neil Shepherd" <[email protected]> wrote:

> When I power cycle the IOIO just the red power light is on, the yellow
> status light stays off
>
> When I plug in an Android phone (or even a USB memory stick) to the IOIO,
> the yellow status light starts blinking about once a second.  My Java app
> can't connect, neither can IOIO manager.
>
> If I unplug the USB device (phone, USB stick) the yellow light keeps
> flashing thereafter.
>
> If there's any reset/fix option, I'd love to know what i can try.
>
> Thanks,
> Neil
>
>
> On Monday, December 16, 2013 5:14:47 PM UTC-8, Ytai wrote:
>>
>> OK, so it's not what I thought.
>> What sort of blinking are you seeing exactly? When do they happen?
>>
>>
>> On Sun, Dec 15, 2013 at 3:56 PM, Neil Shepherd <[email protected]> wrote:
>>
>>> Hi Ytai  - it's not an OTG board, it's a Sparkfun board from about a
>>> year back.  I'm trying to stick with the older board so my piggybacked
>>> board doesn't need to switch pinouts for power.
>>>
>>> Thanks,
>>> Neil
>>>
>>>
>>> On Sunday, December 15, 2013 2:06:44 PM UTC-8, Ytai wrote:
>>>
>>>> Assuming this is a IOIO-OTG.
>>>> Fast blinking LED = your calibration data somehow got wiped.
>>>> Solution: plug in the IOIO to a PC (once). You don't actually have to
>>>> do anything on the PC, the IOIO will calibrate its clock according to the
>>>> host's USB clock.
>>>>
>>>>
>>>> On Sun, Dec 15, 2013 at 1:44 PM, Neil Shepherd <[email protected]>wrote:
>>>>
>>>>> Hello all -
>>>>>
>>>>> I have an IOIO project that's been working just fine with
>>>>> IOIO/Android* until now.
>>>>>
>>>>> I haven't changed my IOIO code in a while, but now when i plug the
>>>>> android phone into the IOIO USB connector, the yellow status light flashes
>>>>> on and off repeatedly (any USB device seems to do this), but my program
>>>>> can't make a connection to the IOIO board.  The Android phone is charging
>>>>> OK, but I don't remember the status LED flashing before - is this an
>>>>> indication of an error condition on the board?   This all used to work
>>>>> beautifully until two days ago, my code hasn't changed, and none of my 
>>>>> code
>>>>> tries to access the status LED.
>>>>>
>>>>> Anyone know?
>>>>>
>>>>> Thanks, Neil
>>>>>
>>>>> * Detailed robotics project - external GPS, servos, external camera
>>>>> controllers, remote logging controlled through Android background service
>>>>>
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