Brand new APM 2.6 not connecting to USB problem, SOS!

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Hey guys, its good to be here! )

I recently bought new APM 2.6 from 3DR.

Right out the box I had a problem when tried to connect it to USB for the first time.
Once USB cable connected - the board flashes once with blue led, then once with orange led, green led stays on, but no more activity… (

There is a video how it looks: youtu.be/61eJkufvHOU

in my Win7 the board appears in Devices and Printers as Arduino Mega 2560, com can be changed - no joy… No Heartbeat…

JP1 jumper is off
powered with PM - same behavior
tested power on the board, got nice and clean 5V and 3.3V
on Reset button the board flashes blue for 6 times with no further activity
tried all USB baud rates
reinstalled all drivers

downloading Arduino library, will try it too.

Any ideas, lads?

Thank you, Andrei

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@SWAIN,
Have you attempted to load any Ardupilot firmware onto the APM?
Regards,
TCIII GM

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[quote=“TCIII”]@SWAIN,
Have you attempted to load any Ardupilot firmware onto the APM?
Regards,
TCIII GM[/quote]

Yes I did, tried several versions 3.2.1, 3.1.2, 3.0.1, 2.9.1b…
during the process board gives me 2 series of 6 blue flashes
at the end I get Comms error message with no joy… (

MP Terminal opens com port, but i get no reply on any command…

I downloaded Arduino IDA but still cant get to the board. When I open the Serial monitor and change baud rate, then board flashes blue 6 times to me, however does not respond to any comands…