Most of Anycubic Photons maintaince information can be found on their website including some manuals: Photon Photon Zero
Luckily the Photons were made with minimum moving parts so there's not a lot to maintain these machines as long as they stay clean.
*Motherboard swap / Access to inside printer
Is your print still failing? Make sure to re-level the printer and there are no cured resin artifacts on the build plate, vat, or the LCD screen.
MUST EXERCISE EXTREME CAUTION WITH ANY LCD SCREEN ISSUES