I've got an LG LCD monitor/tv with composite and scart inputs. It works with my A1200 and I've used it with a working A500. I've tried the b/w composite output. Don't have an A520 ATM.
I would try the 500 with some old telly (b&w portable -whatever) and see if you can get a picture with that. There maybe an issue betwwen the 500 and the LCD.
