RX & TX LEDS on Arduino Nano not flashing after upload in sketch

Development Tools IDE 1.x
1

I am using Windows XP, & after I have finished uploading in sketch, my Arduino Uno boards' RX & TX

LEDs don't flash, however; the pin 13 (L) LED light does, so does this imply I can dismiss this inaction of

the RX & TX LEDs not blinking as a meaningless problem? Because I was under the impression that it was

compulsory that the RX & TX flash before pin 13 flashes, which would signify everything was working

well, but clearly in my case, they don't. My drivers are all up to date & COM3 is the only serial port that

works with this device. Any input would be much appreciated.

2

Are you sure that you actually uploaded the program? Try changing the blink rate and see if the LED blinks at the new rate.

Weedpharma

3

Mine usually flash during the upload - sort of a blink, blink, blur of blinks, then it's done, and they don't flash again if the sketch is not doing any serial interfacing, as the FTDI chip controls the Rx/Tx LEDs.

4

Cross-post.
Thread locked.

5

cross-posted thread: RX & TX LEDS on Arduino Nano not flashing after upload in sketch - Microcontrollers - Arduino Forum