![Arduino MEGA 2560 TX/RX led not blinking, can't upload: avrdude: stk500v2_ReceiveMessage(): timeout : r/ArduinoHelp Arduino MEGA 2560 TX/RX led not blinking, can't upload: avrdude: stk500v2_ReceiveMessage(): timeout : r/ArduinoHelp](https://external-preview.redd.it/Kh3997-_HpzDxCOH57Jssq2r8Kn471u_r8WwRzaiSH0.jpg?auto=webp&s=f3f51967eb977ee20b08c6df477be5b0c4339dd3)
Arduino MEGA 2560 TX/RX led not blinking, can't upload: avrdude: stk500v2_ReceiveMessage(): timeout : r/ArduinoHelp
![Brand new Arduino Uno won't upload and led on 13 blinks 4 times a second - Microcontrollers - Arduino Forum Brand new Arduino Uno won't upload and led on 13 blinks 4 times a second - Microcontrollers - Arduino Forum](https://aws1.discourse-cdn.com/arduino/optimized/4X/4/7/0/470e0d2cd661316c2d167a26213853796082218e_2_500x500.jpeg)
Brand new Arduino Uno won't upload and led on 13 blinks 4 times a second - Microcontrollers - Arduino Forum
![The tx led of arduino uno is always on and the board can't be programmed(programmer not responding) - Installation & Troubleshooting - Arduino Forum The tx led of arduino uno is always on and the board can't be programmed(programmer not responding) - Installation & Troubleshooting - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/d/6/6/d6671e5223ff2a378fea80953ed6dd127bb71b1c.png)
The tx led of arduino uno is always on and the board can't be programmed(programmer not responding) - Installation & Troubleshooting - Arduino Forum
![arduino uno - I'm using nRF2401 and in my transmitter and receiver the Rx is not blinking and Tx is blinking; why does Rx not blink? - Arduino Stack Exchange arduino uno - I'm using nRF2401 and in my transmitter and receiver the Rx is not blinking and Tx is blinking; why does Rx not blink? - Arduino Stack Exchange](https://i.stack.imgur.com/eeZTJ.jpg)
arduino uno - I'm using nRF2401 and in my transmitter and receiver the Rx is not blinking and Tx is blinking; why does Rx not blink? - Arduino Stack Exchange
![programming - Arduino UNO does not get recognized by PC(no USB connecting sound), also TX and RX not blinking, neither are lit - Arduino Stack Exchange programming - Arduino UNO does not get recognized by PC(no USB connecting sound), also TX and RX not blinking, neither are lit - Arduino Stack Exchange](https://i.stack.imgur.com/Jh66v.jpg)