I tried slapping the chassis and poking some parts near the flyback/HOT with a pencil while in 1024x768 mode, nothing happened.
I did notice that when the monitor is displaying 640x480 and 800x600, the HOT is warm. But with 1024x768 it gets burning hot, I can't leave my finger there.
I took pictures which show operation in 800x600 and 1024x768, but I'm hyperlinking them so they won't embed in the page. They're huge 10 megapixel shots just like the last ones.
800x600 (SVGA) mode.
1024x768 (XGA) mode. It's broken!