Root d321 stuck at LG screen with fastboot

[aaron713]

Ive tried restoring stock laf to get into download mode to flash stock kdz but it gets an error.
I need the stock laf file, i can also get into CWM but formatting dosent help.
PLEASE help, i know how to flash to stock kdz i just need to get into the original download mode.

 

[aaron713]

i get an INVALID BOOT IMAGE HEADER when i type fastboot continue

 

[aaron713]

update
i found the original laf file
now when booting into download mode i get a Secure Booting Error and it goes to a black screen but it is recongnized by the computer. where should i go from here?

 

[JaviGalvez]

Could you share original laf.img for D321 plz.

 

[Mystery_Flasher]

You may check this KDZ firmware and extract it to get the files you need.
http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=FWD9SRH232TZAJS0D893YQN/D32110d_00.kdz

KDZ Extractor's site: http://forum.xda-developers.com/showthread.php?t=2600575

This is the site where the KDZ is stored:
http://lg-phone-firmware.com/index.php?id_mod=51

It says it's for LG F70 but I suppose that information is wrong. The The model number is the same (D321). Aio Wireless/USA is actually the Cricket Wireless since they merged in 2014.