Axoloti no longer powers up

#1

I've had my Axoloti in a case I built for months and use it all the time.
Yesterday it wouldn't power on for band practice.
Now I'm in the office and checking it out and it wont power on from any power source.
My case uses the X2 power inputs on the board, so it should be protected... I didn't do anything out of the ordinary with it...
it just expired.
Is there anything I can do do bring it back?
What happened?
Im gutted!

#2

Even with USB power, IC1 is burning hot
USB: I get 0V on pin 1, 1.1V on pin2 and 3.3V on pin 3
9v: 0,1.1,4.7
+5V=4.8V VDD=0.9V VDDA= 0.9V VDDC=3.29V

#3

I have another board, I put it in the enclosure and it works perfectly fine, this leaves me with the following questions:
1. Do I have a defective board or are these boards just unreliable?
2. Is there something I am doing in this enclosure that caused the board to fail?
3. Is there something I could be doing to prevent this from happening?
4. Can I get a replacement for this board that failed?

Ive been using it in this enclosure since June without issue, it is a primary part of my live performances and Im left feeling a bit insecure about it...

#4

does the working board also get hot on ic1 with your power supply?
are there any led's still flashing on the defective board?

#5

yes, hot with either USB or 9V in... no LEDs ever

#6

ok. i meant the functioning board. does IC1 get got there with your power supply?

looks like the other board is dead, if you don't even get any LED activity. what happens when you plug the broken board into a computer, any sign there? is it being recognized somehow (on linux or osx you can check sudo dmesg in a console and see if there is a change for example)

#7

Yes, the new board works perfectly fine...
What really scares me is that Im not bypassing any power conditioning or safety on the board, so how did it die?
I cant have this happen when Im about to (or during) a performance...
The broken board does not respond at all.

#8

i would contact @johannes and see if you can troubleshoot further.

given the fact, that no other boards just died i would feel pretty save for performances...

one thing to look into would be shorts or not well made connections that could have caused this...

#9

Note that the x2 inputs have no reverse polarity protection! So feeding + - the wrong way around could fry the board.

Only if you use the dc plug you have the protection!

#10

theres no way that could have happened, however, some diodes would fix the possibility quite easily

#11

one last thing, have you measured your power supply with a multimeter? some say they output 12v but the actual voltage is much higher, around 15-16v. maybe that was the cause of failure?

#12

what I did is going going with short wires from the solder joint of the dc plug to some of the unused points next to the dc part and adding pins there for connecting jumper cables. I have fried more than one board, so I just wanted to make shure :wink:

To answer this I use axoloti a lot for giggin and jamming, sometimes in very rough conditions like outdoor open air raves in the woods etc. and it has never failed me.

So propably the best is to write Johannes and see what he can do.

#13

It's 9v, mulitmeter @9.34v

#14

The same here, shall I open another thread?
My board (v1.2) just died but with very little use. A few days ago I used it for 2h today tried to connect it to computer and it got really hot near the micro usb port, no leds, tried de 9v port with correct polarity and got the same, no leds and really hot.
Never soldered any pins, and no case either...
What can be done? Any help appreciated.