PS1 SCPH-7502 No Laser

So I got a cheap PS1 and it won't read discs at all. I tried to adjust the pot with a multimeter but nothing. I tried to look into the laser in a dark room and it definitely doesn't seem to light up however it does move up and down like trying to focus and the motor spins twice showing that it has power.

Is it likely the diode in the laser that failed? I heard the regulators can cause the problem but everything else works fine. Controller ports and memory card slots are fine.

A...

PS1 SCPH-7502 No Laser