about 6 weeks ago, I updated firmware to 173 and the unit worked OK, accessed it the usual ways to test. Left it running, but otherwise didn't access it for a week or so. Now it flashes red 7X which shows in the manual as corrupted firmware. I've downloaded a 174 firmware file. Can't access through the LAN, so is there a way to load it via the USB port on the LS210 ? Or do I need to do something else to get it running again ? Using Windows PC's.