My arduino nano worked fine, i didn't do anything to it (i supose) now it is not working, when i connect it to my computer it is not seen, the only led that is turned on is PMR in red color
Try a different non charging cable. Try it on another machine. This will help narrow down where the problem is.
Your computer will make a system chime when you insert a USB "data cable" but will not make a chime with a "charging cable."
Thanks for your response.
I'm using data cable, I tried different cables and tested my cable with phone(It works) but Arduino doesn't appear in my computer. Do you have any other suggestions?
Mine does not do that, I never enabled it and forgot about it. My wife's Windoz does not chime either, Why I do not know and never thought about it. That is a OS (Operating System) thing.
Not hijacking ... Windows button >> Control Panel >> Adjust System Sound >> look for the "mute" symbol on the system column.

These sounds get unintentionally adjusted when listening to videos...
I guess I should have mentioned I have Linux, it is a bit different. There are sounds available but I keep most of them off as it can disturbed the ones around me. I started way before there were sounds, windows, etc, in the pre CPM era and love the quiet. Thanks for the information it will help other windoz users.
Your other topic on the same subject deleted.
Please do not duplicate your questions as doing so wastes the time and effort of the volunteers trying to help you as they are then answering the same thing in different places.
Please create one topic only for your question and choose the forum category carefully. If you have multiple questions about the same project then please ask your questions in the one topic as the answers to one question provide useful context for the others, and also you won’t have to keep explaining your project repeatedly.
Repeated duplicate posting could result in a temporary or permanent ban from the forum.
Could you take a few moments to Learn How To Use The Forum
It will help you get the best out of the forum in the future.
Thank you.
I apologise for duplicate. Do you have other idea to main topic
You haven't told us if your USB port is working with other devices, just that your cable did. If you can, for example, transfer photos from your phone to your computer over the same port you've been trying to connect your Arduino to, then I'm afraid it is very likely your Arduino is damaged; to be sure, try the Arduino on a Windows computer; it should be acknowledged by Windows when you plug it in, likely as an unknown device.
If changing the cable does not help, maybe the driver IC has been damaged.
try to upload to your arduino a blink example for there costycnc.it/avr1 ... this page compile asm code and upload to arduino ... also if you try lo learn some asm code in parallel with programming with ide arduino... you can learn some about arduino architecture that help you understand better atmega328 and microcontrollers in general about registers, interrupts, ecc ... i remind you that with asm you can not create big programs ... with asm only help you understand better low programming and microcontrollers architecture that help you understand better the functions when use advanced ide
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