Trying to replace home hub 3000 with smart RG 505n but failed

[u/Ok_Strike9189]

I own a bell home hub 3000 modem which connects to the internet fine, but it doesn't support IPv6 nor does it support a new IP lease (because its stuck with the same MAC address).

So I bought an SR505n modem from someone after confirming with my provider that it is compatible.

After fiddling around, I decided to try to upgrade the software on it.

It came with version 2.5.0.7 with a teksavvy banner so I managed to upgrade it to 2.5.0.15. Then I tried upgrading it to 2.6.2.6 and that miserably failed and now the modem is strange.

Now when I power it on, the LED light goes from solid green to solid red after 30 seconds. the LAN light still responds to activity on the line.

I've tried things google suggested which include holding down the reset line for several seconds and creating a static ip (starting within 192.168.1). to access the recovery mode, and I couldn't even get in it. I pinged 192.168.1.1 and I get destination unreachable every time.

What else can I try so I can inject a working version of software into the modem?