If you are getting a blank screen when booting into recovery, then you likely do have recovery, it just is an older version that doesn't have the LCD drivers for your phone. It'll still be functional (as in you can select all the operations), you just won't get any visual feedback.
However I don't know which recovery you have as there are more than one recovery that suffers from the LCD problem.
You likely can recover from this, but if you keep messing with the phone you might get into a state where you can't recover.
First thing you can try is as the previous poster mentioned, Android Screencast. This will display your phone's framebuffer in a window on your PC. You need to enable Screencast inside of Android, then reboot into recovery while keeping the USB cable plugged in. It won't work directly from recovery.
If that doesn't work, I need to know what process you did to get where you are at.
You said you are on grom 2.2, which is a ZVH rom. How did you get to ZVH? Did you follow the ZVH rooting thread? If not, please explain what you did in more detail.
I basically need to figure out what you have installed and "blank screen" isn't very descriptive, so I need to back track and figure out what you did to figure out what you have.