I wasn't paying attention to dialogue and now I'm stuck. I'm at the part where there's the elevator and the 3 lasers in the ruins
Thank you for the confirmation. And yes that is indeed the old Tripteen.
To advance you do have to disable these lasers first, the process for which you seem to have missed. Please head back to this point here:
Clearing the zone ahead should put you back on track. Also make doubly sure your suit is repaired.