Led kontrol not working on 7141

[hrust_ray]

Hi.
I tryed to control leds from terminal with commands
echo 7,1 >/var/led
ant I see no reaction. Is it a common problem of 7141?

 

[olistudent]

Try "echo 7,4>/var/led".

Greets, Oliver

 

[hrust_ray]

Nothing happened