Medkit restore (4 leds) on Omnia hangs

For a long time the auto update feature on Omnia failed many times. Thus I decided to go through medkit image file restore on USB flash. I have copied the file to FAT32 USB root and inserted to Omnia. Hold down the reset button until the 4 red leds. Then I kept router running and went away. I came after 20 minutes and all led shine orange-red colour and nothing seems to happen. After one hour still the same status. Omnia seems hanged. Any idea what does this mean and what to do? Thanks.