July 2nd, 2012, 03:28 PM
Moderati ergo sum
Join Date: Jun 2010
Device(s): Nexus 4, Galaxy S II,
Nexus 1 (retired),
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You can't get into recovery because ROM Manager trashed it. It should come with a big red warning label "DO NOT INSTALL ON SAMSUNG PHONES".
If you rooted originally with the Zedomax kernel, then yes, just put the phone into download mode and reflash with odin.
With the phone OFF, hold down the vol. down and vol. up buttons and plug the USB cable into the phone. You should see the warning about flashing custom firmware. Press vol. up to confirm. Set the phone down for now.
On the PC, open odin. It should show the phone is connected by having a yellow box in the upper left with a com port listed. Click the PDA button and find the kernel file. Then you just press start and the phone will reboot when done.
From there you should be able to get into recovery.