No network access - can't login - can't reset

[robatbentley]

My 7800DXL pretty well dies on me this morning. Subsituted my old BT2700HGV and regained access to broadband.
Symptoms:
(1) Can't login. When selecting the login page, and providing the user/pass (not changed in year or so) just keeps denying access and requesting login details..
(2) Attempted power down and up cycles - same problem as above.
(3) Attempting to browe using Firefox just displayed a dodgy looking BT Wholesay page saying you no longer have an ISP!
(3) Attempted reset didn't use the admin/admin login details. I'll try this later. Update: successfully logged-in and reconfigured my router.

Update: Looks like my router set itself back to factory settings (even before my above attempt). No idea how.

Any suggestion?

[billion_fan]

My 7800DXL pretty well dies on me this morning. Subsituted my old BT2700HGV and regained access to broadband.
Symptoms:
(1) Can't login. When selecting the login page, and providing the user/pass (not changed in year or so) just keeps denying access and requesting login details..
(2) Attempted power down and up cycles - same problem as above.
(3) Attempting to browe using Firefox just displayed a dodgy looking BT Wholesay page saying you no longer have an ISP!
(3) Attempted reset didn't use the admin/admin login details. I'll try this later. Update: successfully logged-in and reconfigured my router.

Update: Looks like my router set itself back to factory settings (even before my above attempt). No idea how.

Any suggestion?

Not sure as I've never seen this before, what firmware version are you running??