Looks more like a dead panel or faulty controller.
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I can't tell you what's wrong, but these shorted pads aren't it. They are added to the traces for extra thermal mass, a bit more or less solder doesn't hurt. If you look closely, all of the shorted pads are on the same trace of the PCB, so they would be connected anyways.
Could it indicate something overheated on the other side of the board (the transformer)?
Maybe, but the plastic of the transformer would show signs of melting/burning way before the solder on the other side would be melting.
I found a used parts PSU board on aliexpress for $40 USD that claims to be tested and working, might as well grab that.
I do have a video of the monitor freaking out, but I can't access catbox.moe and I don't know where else to upload



