Hello, I need some help.
I recently got this new Arduino UNO board from amazon.
It was working well, I always power it through the USB data cable connected to my laptop.
Today, it was not being recognised by Arduino IDE and I touched the gold chip next to the USB port (Both gold chip and USB port was hot, especially the gold chip). Does anyone know to help? There is an image here:

 

Hello, I need some help.
I recently got this new Arduino UNO board from amazon.
It was working well, I always power it through the USB data cable connected to my laptop.
Today, it was not being recognised by Arduino IDE and I touched the gold chip next to the USB port (Both gold chip and USB port was hot, especially the gold chip). Does anyone know to help? There is an image here:

It is likely damaged.

 

Hello, I need some help.
I recently got this new Arduino UNO board from amazon.
It was working well, I always power it through the USB data cable connected to my laptop.
Today, it was not being recognised by Arduino IDE and I touched the gold chip next to the USB port (Both gold chip and USB port was hot, especially the gold chip). Does anyone know to help? There is an image here:

Also when I connect it to my laptop, it doesnt even light up or anything. Before, the LED's lit up whenever I connected it to my laptop. Someone please help, I need this for my school science project

 

It is likely damaged.

Thanks for the help, but would you know what part of the board is damaged? Maybe the cable?

 

Also when I connect it to my laptop, it doesnt even light up or anything. Before, the LED's lit up whenever I connected it to my laptop. Someone please help, I need this for my school science project

Most likely the chip that is getting hot.

Your best bet is probably to order rate new one.

 

Most likely the chip that is getting hot.

Your best bet is probably to order rate new one.

Thanks for the help. Is there any other way that this could work? Perhaps changing the cable from USB data to the Jack cable?

 

hi CD.
From your description, I would say you have a short circuit on the regulated 5v supply output.

This link has some information that may help you test the PCB.
Check also page #2 of the link.
E
https://rheingoldheavy.com/arduino-from-scratch-part-2-voltage-regulator-subsystem/

 

hi CD,
Another circuit link.
E
https://learn.circuit.rocks/the-basic-arduino-schematic-diagram

 

The device next to the USB port is likely a PTC device, basically a type of reset-able fuse. If you have a short in the 5V circuit, it is likely this device will have a high resistance and get hot (hence the resistance rises even more).
Either you overloaded the 5V regulator (too big a load, more than 500mA), sent too high a voltage to the input barrel jack, or something else probably destroyed the 5V regulator, which may now be a dead short between the 5V feed and ground.

 

in order to proceed with your project, the best you can do is order another one and later worry about repairing this one.

keep in mind, whatever killed this one is still around and will likely kill the replacement too. so you may want to order more than one replacement or at least post circuit tyhat you used so we can try to offer some advice.
not sure hat golden part you are taling about. Arduino is well documented and if you cannot point to specific part on shcematics, or at least post picture of it and highlight part ths that get hot... this is not something you can repair...

as for repair... you may want to disconnect it from whatever you use to power it up and measure across uno power rails to see if there is a short. likely it is. possibly it is the voltage regulator but could be other things too. whatever is shorted is drawing high current. if it is a voltage regulator, that is easy thing to replace since it is a low pin cunt device and it does not need firmware. if you are not familiar with SMT work, consider destroying the suspect part (use flash curtter to cut the pins) then desolder one tab or pin at a time. once this is off the board, check again if the short is still present or not if it is no longer present, you have found the problem. then you can try to power it from USB port and check for signs of life. if alive, get replacement NCP1117 regulator and solder it back.

but things ar erarely that easy. chaces are something else is short and regulator is just trying to do its job. and this regulator (like many otehrs) has protection - it can endure short circuit at the output indevfinitely (and get hot at the same time). so if you need help, you better start posting some info that can help narrow the problem down.

if your Arduino has main MCU on a socket, you can extract the IC and see if the problem goes away (no heat). and you can also put extracted IC into breadboard and see it it runs there.

bte your previous attempt to post image did not work.

 

Hi,
Are you talking about the basic Uno, or have you got anything connected to it apart from the usb cable?
Have you programmed it? Just asking.
Good luck...........