How do you remove an IC socket from a board?

I'm having no luck finding an appropriate guide/tutorial. All I can find are guides about removing soldered ICs and replacing them with sockets, not how to remove a socket once it's already on a board.

Can anyone point me in the right direction?

Here's the socket I'm trying to remove:

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I've tried prying the plastic frame of the socket off the board already, but it doesn't budge. This socket was an after-market replacement someone did--it's not original to the board.

It seems like there are locking tangs of some sort, but I don't know how to release them.

Yeah, I've got a desoldering pump. I was really hoping to be able to get the plastic frame off then worry about each individual pin, rather than trying to desolder the whole thing as-is.

There's barely 1mm of clearance between the socket frame and the board. I can't get anything under it other than a tiny screwdriver blade (or a chip puller at the ends).

To repair damaged traces. It looks like whomever attempted prior repairs caused some damage.

Thanks for the suggestion, looks like that did the trick

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As it turned out, there were three broken traces under the socket. No wonder the board wouldn't boot.

Yellow arrows point out the repairs I made. The trace with the tail still on it was temporary, and I cut it off after the socket was in just to make sure it didn't go anywhere while I was soldering the socket (since the other end of that strand of wire went through the pin hole in the board).

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The board's condition has improved, but still isn't booting yet. I'll probably remove a couple of the other sockets that look questionable as well.