Arduino UNO can not upload.

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Arduino UNO can not upload.

Postby wesley12 » Sat Apr 29, 2017 7:13 pm

So, i bought an arduino uno from cytron last year.
It's good and functional until yesterday.
The board i used out of sudden can not upload codes.
I tried bootloader but it shows errors. The L led is not blinking. (It's blinking during the setup when usb plug in).
Reset button also not working. Please help as it's urgent.
wesley12
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Re: Arduino UNO can not upload.

Postby Idris » Tue May 02, 2017 9:21 pm

Hi wesley12,

I try to identify the problem, but the reason "out of sudden can not upload codes" really not help much. So my suggestions:
1. Check whether Arduino COM port still detected.
2. Measure all the voltage pins, 3.3V, 5V and Vin, is it correct?
3. Try to replace ATmega328P chip and burn bootloader.
4. If still problem, maybe crystal not working.

Thanks.
Cytron Technologies invest time and resources providing tutorial, training and support for STEM education and maker movement. We need your support by purchasing products from Cytron Technologies. Thanks.
http://www.cytron.com.my
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