3Com 3CRWE554G72T User Guide - Page 108

108 CHAPTER 6: TROUBLESHOOTING Alternatively, quote the part number for your region: Table 3 Power Adapter Part Numbers Part Number 3C16760 3C16761 3C16762 3C16763 3C16764 3C16766 3C16767 3C16768 Region US and Canada UK Europe and Middle East Australasia (except Japan and Korea) South Africa Japan Korea Argentina Alert LED The Alert LED will flash when the Router unit is first powered up while the system software checks the hardware for proper operation. Once the Router has started normal operation, the Alert LED will go out. ■ If the Alert LED does not go out following start up, but illuminates continuously, this indicates that the software has detected a possible fault with the hardware. Remove power from the Router, wait 10 seconds and then re-apply power. If the Alert LED comes on continuously again, then a fault has been detected. Locate the copy of the Router software on the accompanying CD-ROM or 3Com web site (http://www.3com.com) and upload it to the Router to see if this clears the fault (refer to "Recovering from Corrupted Software" below). If this does not fix the problem, contact your supplier for further advice. ■ During normal operation, you may notice the Alert LED lighting briefly from time to time. This indicates that the Router has detected a hacker attack from the Internet and has prevented it from harming your network. You need take no specific action on this, unless you decide that these attacks are happening frequently in which case you may wish to discuss this with your ISP. The Router logs such attacks, and this information is available through the Status and Logs screens. Recovering from If the Alert LED remains permanently on following power-up, it is possible Corrupted Software that the system software has become corrupted. In this condition, the Router will enter a "recovery" state; DHCP is disabled, and the LAN IP