LattePanda Alpha USB high voltage input

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User avatar
yehorBrooklyn
Posts: 3
Joined: Wed Aug 05, 2020 3:36 pm

Wed Aug 05, 2020 3:49 pm

Hello,

Because of my mistake I have plugged in the USB connector from my motor driver directly to LattePanda USB input. The problem is that the driver outputs 15 V and after I plugged it something went wrong.

Now I can turn on my panda and all USB ports are working. However the Arduino seems to be burned , because I do not see it in /dev and the indicator does not flash. Also the biggest problem is that LattePanda started to heat up very fast (the board) even without load.

Maybe someone can suggest me , how can I debug where is the problem and why panda is heating up.

Thank you, regards!!

User avatar
calpin
Site Admin
Posts: 46
Joined: Fri Apr 15, 2016 9:21 am

Thu Aug 06, 2020 2:35 am

Hi,which USB port you might burned?You can watch the components around the port first to check if there is any burned mark . If nothing found. Try close that usb in bios seeting specially the Arduino 32u4 part.

User avatar
ccs_hello
Posts: 623
Joined: Sat Oct 13, 2018 9:16 pm

Thu Aug 06, 2020 4:06 am

Be careful! Heating up very fast is an imminant sign something major will fail forever.
Ask an experiecnce electronics guru to take a look to fix the issues before propagate to the entire circuit board ,or alternately,
talk to LP Tech support.

User avatar
yehorBrooklyn
Posts: 3
Joined: Wed Aug 05, 2020 3:36 pm

Thu Aug 06, 2020 8:11 am

calpin wrote:
Thu Aug 06, 2020 2:35 am
Hi,which USB port you might burned?You can watch the components around the port first to check if there is any burned mark . If nothing found. Try close that usb in bios seeting specially the Arduino 32u4 part.
I plugged in the middle USB 3.0. With the visual check there is no burned components. I have tried to reset Arduino via button and via BIOS, but nothing helped me. The board is still heating up very fast and strong, after 10 minutes of work it is turned off. The cooler doesn't work as well.

I found that on Realtek LC269 Audio codec heats the most. And maybe heat up board.

The headphones doesn't work as well.

User avatar
calpin
Site Admin
Posts: 46
Joined: Fri Apr 15, 2016 9:21 am

Tue Aug 11, 2020 3:10 am

yehorBrooklyn wrote:
Thu Aug 06, 2020 8:11 am
calpin wrote:
Thu Aug 06, 2020 2:35 am
Hi,which USB port you might burned?You can watch the components around the port first to check if there is any burned mark . If nothing found. Try close that usb in bios seeting specially the Arduino 32u4 part.
I plugged in the middle USB 3.0. With the visual check there is no burned components. I have tried to reset Arduino via button and via BIOS, but nothing helped me. The board is still heating up very fast and strong, after 10 minutes of work it is turned off. The cooler doesn't work as well.

I found that on Realtek LC269 Audio codec heats the most. And maybe heat up board.

The headphones doesn't work as well.
I'm afraid the Audio codec and Arduino chip already broken. If you don't need to use that , may be try to remove it with Welding Iron.
But as ccs_hello suggest, ask techsupport@lattepanda.com first.

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