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TFP - All Lights Shut off!

Okay, so clearly I am brand new at the whole TFP thing.  In fact it just arrived today and I am testing it out.  It looks basically new but is used.  At first I had it hooked up to a nice, clean 6V DC supply and it worked normally.  Then I tested it on my PC via a USB 3 port.  It loaded up a class driver immediately and began working.  It worked normally in my DAW (Samplitude Pro X3) spewing MIDI data without issues.  Then, I shut down my DAW, leaving the TFP connected via USB.  About 30 seconds after I shut off the DAW, ALL the TFP lights, including the LCD backlight, shut off.  The odd thing was that it was still active!  I could see the LCD via ambient lighting and it was still responding to button presses!  Then I restarted my DAW and all the lights came back on immediately.  I tested this a number of times and each time it did the same thing with virtually identical timing.  DAW off, lights off 30 seconds later.  DAW on, lights on immediately.

The panel and LCD lights all remained on consistently while the DAW was connected.

I continued testing and now it isn't doing that anymore.  Did I get it into some strange mode?  Is this some bizarre power save mode?

Thanks for any info.
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  • the DC power was plugged in when u closed the DAW? or was it connected only via usb

    the TFP dosent like some usb ports. move it to the same port u plugged it in the first time. or switch it around till u find the one that works.

    Or

    In that 30 seconds did you change the contrast without knowing it?

    Always use the DC power unless u have to use usb only.. using the usb draws to much power from the pc or laptop you are running. Then when u get many usb devices connected at once powered only by usb you are going to run into problems.

    hope that helps.
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  • Only connected via USB at the point I was testing with the DAW. I didn't change contrast. It was not just the LCD that went off it was ALL lights on the TFP, pads, buttons, everything! And it would all come back on instantly the moment the DAW was restarted as though by command.
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  • ok so I dont understand what the problem is.

    The lights dont come on when u run arsenal as a standalone. when its connected via usb only?

    To me it sound like the drivers are not gettng initiated correctly for the TFP to boot up.

    did u try moving to a different usb port?
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  • Hey ArpAxxe,

    Thanks for posting!

    Sorry you're having trouble with that! A strange behavior you've described here. The TFP is able to receive enough power from just your computer's USB port so you won't need to connect the power adapter as well. The power adapter is useful if you are not using a computer but using the TFP's sequencer with external MIDI equipment.

    With that in mind, if the TFP is connected to your computer, it should be receiving power - whether you have a DAW open or not should have no bearing on whether the TFP is receiving power from your computer.

    Have you ever tested this TFP with another computer? Can you reproduce the same behavior? Let me know!
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  • I haven't seen the same behavior using the adapter or in subsequent USB only tests.  Strange indeed as it was quite predictable right down to the 30 second timeout.  Whatever it was, it was not random.  I will get back to you if I see it again.  Thanks Nick!
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  • I reproduced this using a USB portable battery.  The same thing can be done with a USB power supply like a nice wall charger.  

    I used a high quality ANKER 13000mAh battery that puts out a well regulated 5V supply.  Anyhow when using this via a normal USB cable the TFP does exactly the same thing I described.  It does not appear to startup when you press the power button as no lights or backlight come on.  However if you look closely, it's clear the unit is actually running as the normal characters are being displayed actively on the LCD just without any backlighting.  Even more strangely it actually does respond to button presses as the LCD changes accordingly but again with no backlight.  

    It seems that the TFP shuts down all the display lights when there is no connection on the data pins of the USB.  So power is still running all the main processes, but the lights go out.  A very strange design decision or mistake especially considering the unit still actively accepts input during this "blackout".  The TFP does not need a data connection to operate and of course works just fine with a power supply alone.  It behave consistently and accept power over the USB with the data connection.  

    It should be easy for you to reproduce this Nick with any decent USB portable battery or power supply.  So long as there is no data connection, the TFP lights remain off.
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  • I tested it again with a normal power adapter and it ran for hours with the display and all lights running normally.
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