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I'd like to build a small internet radio out of my pi, but I'd like to use it at night, when the flashing LEDs would be disturbing. Is there any way to disable them?

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Is a pair of pliers an inappropriate answer? – Alex Chamberlain Jan 9 '13 at 16:30
    
@AlexChamberlain Fine, a way that doesn't void the warranty! – Tom Medley Jan 9 '13 at 16:31
    
Possible duplicate: raspberrypi.stackexchange.com/q/697/797 – Morgan Courbet Jan 9 '13 at 16:34
up vote 5 down vote accepted

No

Unfortunately not. The PWR LED, for example, is directly wired to the 5V rail and other LEDs are controlled by closed-binaries.

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3  
Sigh, electrical tape it is then. – Tom Medley Jan 9 '13 at 16:33

I know this may sound silly, but a piece of electricians tape over the top would work. Alternatively, put it in a case or box.

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The best and most simple solution! – ikku Jan 10 '13 at 0:32

There is answer in How do I control the system LEDs using my software?

For Power led, if you have RPI 2, then you can turn it off by using

echo 0 > /sys/class/leds/led1/brightness # Power LED

It is taken from the last answer from post I referred.

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Does not work RPI 3 – akhmed Jun 2 at 6:59

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