I need to see the full error message, specifically which file the apply_patch_check is failing for.
The error I get is right after "Verifying current system"
assert failed: apply_patch_check("EMMC: /dev/block/mmcblk0p7 : 5712128 : fb95a5d43d651be3972f96e8d6d2eb181a9fc66b : 5703936 : c1662e87c5d06b735cb46b9673876727f65cb48b","fb95a5d43d651be3972f96e8d6d2eb181a9fc66b")
E:Error in /sdcard/I747UGLH9_OTA.zip
(Status 7)
Installation aborted.
Thanks!
mmcblk0p7 is the kernel. Do you have a custom kernel installed? If so, you can try the "no_kernel" zip in the OP (I haven't tried it myself, but it should work) or you can revert back to the LG1 stock kernel (you can get it here) and then proceed.