beagleboard not not turn on or blink usr0 usr1 LED

Hi

beagleboard not not turn on or blink usr0 usr1 LED, my beagleboard is
broken?
my board
C4

Hello Lamp,
were you working with GPIO5 from your processor?
It is possible that you have set bit 22 from register 0x49056034 to 1.
This "register is used to enable the pins output capabilities". If set
to 1, the GPIO which makes the LED USR0 to pulse would be set as an
input. That way, the USR0 wouldn't blink any longer. Just check if
this bit is 0 before taking any further assumptions.
Regards,
Frederico