how i can do that ??If you don't have a NAND backup you're pretty stuck. If you have a hardmod (and a backup of your system as it is now) and your sysNAND is on 9.0-9.2, try using SafeArm9Installer.3dsx from homebrew to "update" your a9lh installation with v2. However I have no idea if it would work and you definitely should not do it without a hardmod. If you do do it, please report back to inform us if it worked or bricked!
Edit: the Time Machine page on Gateway's website says that users are advised to have both a known valid NAND backup before proceeding AND a hardmod ... hopefully you have at least one of these! :-)
updateing to v2 A9LH so i can use LUMA ??