Chronology:

Installed Rom Manager from store
With this app, I've installed the provided recovery.
Success

Installed CyanogenMod 7 from SD
Success

Cool rom, but problematic behaviour. Wanted to go back.

Did something bad (Can't remember what), now it only boots on two possibilities: Emergency mode OR Fastboot mode (which stucks on fastboot: processing commands)



I have LG hacking package, which contains: a Rooter, a batch that tries to restore stock recover (the stock.img is there), LG's B2CApp, KDZ Updater, drivers AND the original rom: V10H_00.kdz

None works

• The batch stays in Waiting for device
• KDZ says No device detected
• B2Capp the same
• Tried that driver, and the new one I could find on LG website. None worked, no matter what mode.

What to do ?

 

Fixed


Took some time to perceive that fastboot is just like adb
Found the commands online and pushed an boot.img from Cyanogen7

Now it's back to normal