LG G2 D802(T) Recovery Issue
I had the same problem with my D802T. What you need to do is that before you install recovery, copy the zip file for any rom ( i did cloudyg2 3.3). Then once you boot into recovery, wipe the cache and dalvik cache and then install the zip. Once the installation is successful, the phone will boot into the rom without getting stuck at the LG logo. Once you are into the rom you can switch off the phone and try to use the key combination ( vol down + power keys) to go into recovery. Or else download an app that lets you boot into recovery.

For more info go to this  link. Look for my comment on page 2 for more details. 
Hope it helps