DS 8550/10 Problem. Leds blinking

[GranOso]

Hello everyone... I have problems with my ds. Without ac The ds doesn't work at all and when i plugged to AC and i press on botton, The leds blink and there is no way to run IT. Does anyone knows if i have to press several bottons at The same time or something like this? I have done everything and IT doesn't work.

Thank you very much

[Pacman]

unplug the device from the power supply,
wait for five minutes,
plug the device back into the power supply, and
switch on the device.