D-Link DIR-655 :: How To Check Router Uptime

I get frequent internet disconnects.  Sometimes when I notice I can't get into the web gui; other time I can get in but I have to re-authenticate, and I see the wan port is re-initializing.  So of course, the "WAN uptime" starts again at zero.  I can then look at the "statistics" page and see that the LAN packets are really low (like low 4 digits).  SO, my guess is the router is randomly resetting.  But how can I check the router uptime??  I searched and I see plenty of folks reporting their uptimes, but I can't find it anywhere in the GUI.  I want to be able to prove that it's the router and not the cable modem or WAN connection....I was getting the logs emailed, but really can't decipher anything.  I have "system activity", "attacks", and "notices" enabled.  It's DIR-655, hardware B1, firmware 2.10NA.I already emailed DLINK support asking for a warranty replacement, as this one is only 10 months old.  If they don't come through, it's time to jump ship to a new vendor.  Will be my second dead one in under a year.