Hi Everyone,
I really need ur help because I am unable to troubleshoot my problem. I have two Uno board but one is working & other is not.
When I am connecting the faulty board, my system is unable to fine Arduino Board & showing message . I changed my Micro-controller but it is still not working. Power led is on but other led is not giving any response.
Probably the usb-to-serial microchip is blown.
Are they official Arduino boards ? If the faulty one is a cheap clone from Ebay, perhaps some cheap component is broken or a soldering point is not properly soldered.
It is official board & i had tested many code on this board but my friend was using it & during testing of a code it suddenly stopped working.
Boards rarely "suddenly" stop working. The board was probably damaged at some point and eventually failed.
Commonly happens when someone puts higher than 5V on the 5V pin, but could be any number of things.