Armanti

So I recently bought a Lexus ls400 1990. I’ve had it for over a month now but the 3rd week of owning it, it wouldn’t turn on. When I try to turn it on all I hear is like a single click from under the glovebox or near the glovebox. There’s no click coming from the starter unless the single click I hear coming from the glove box is the starter trying to start. Check engine light is on & the battery is fine got it tested. Anyone have an idea of what’s wrong with it before I take it to a mechanic?

I was wondering if anyone has a step by step guide to removing the intake manifold on my 1990 ls400. I’m new to cars but really good when it comes to tedious projects like this, I just don’t want to mess anything up by experimenting how to do it on my own. There’s other threads that followed up on this procedure but I’m more of a visual learner & pictures don’t really do justice for me, I’m in need of a video. If anyone has a video on how to remove the intake manifold it would be greatly appreciated! (P.s. it’s so I can replace my starter that recently went out)