Same as LineageOS ROM for Zenfone Max wich is also based on Android Nougat 7.1.1, it does still include various hardware-specific code as CyanogenMod, which is also slowly being open-sourced anyway. You can download Lineage OS for Zenfone 2 Laser [audahadi-Z00ED] and follow the instructions we'll give you afterwards.
Now you know if it okay to have a lighweight ROM but please do these following tasks with carefully before you proceed with flashing custom ROM:
Task 1: Install USB drivers for your device on your PC.
Task 2: Be sure to backup your data including Contacts, SMS / MMS, APN & MMS Settings as well as photos and videos stored on your device’s internal or external storage.
Task 3: Make sure that your device is well charged. Ideally, the battery level should be around 60-80%. The more the better.
Task 4: USB Debugging should be enabled on your device.
Important: Most of the custom ROM will not have Google Apps in them. So, you will have to download and install GApps manually.
If those prequsites above has done then the last thing is to make sure you have TWRP recovery. In short says, it let’s you do a number of cool stuff but the whole point of having a custom recovery is to be able to flash unsigned .zip files. These .zip files could be anything from a custom kernel, boot, recovery, MODs or full custom ROMs. But in this scenario, it used for flasing Lineage OS ROM zip and (additionally) GAPPS zip to Zenfone 2 Laser.
Now we can begin flash a Lineage OS ROM on Zenfone 2 Laser using TWRP recovery.
How to Install a Lineage os ROM using TWRP Recovery
Here the step by step how to flash Lineage OS ROM.
Download and transfer the Lineage OS ROM and GAPPS for Lineage OS to your device’s storage.
Boot your device into TWRP recovery.
Select “Wipe” from TWRP main menu and do a “Swipe to Factory Reset” on the bottom of screen.
└ Note: This will factory reset your device. If incase you want to dirty flash this ROM, you don't need to a factory reset, then simply skip this step. But it possibly cause a problem in future.
Go back to TWRP main menu, tap on “Install” and select the Lineage os ROM .zip file and gapps for lineage os that you transferred to your device at first.
After selecting the .zip file, do “Swipe to Confirm Flash” on the bottom of screen to begin the custom ROM installation process. This may take some time, please be patient.
Once your ROM is successfully flashed, you’ll see “Wipe cache/dalvik” option, select it and then do “Swipe to wipe” on bottom of screen.
Once cache & dalvik wipe completes, hit the “Back” button on-screen and then select “Reboot System” button.
REQUIRED LINKS AND FILES FOR Zenfone 2 Laser LINEAGE OS 14.1 NOUGAT CUSTOM ROM:
1. Download gapps for Lineage OS 7.1.1
2. Download of Lineage 14.1 for Zenfone 2 Laser
3. How to Root Lineage OS rom Easily