Monitor blacks out when fridge turns on - bad power supply? Surge protection?
Pretty clearly the sudden draw from starting the fridge's compressor is pulling down the line enough to cause the monitor to hiccup. The question is what to do about it. Some suggestions:


Buy a new monitor (they're getting cheaper all the time)
Get a line voltage stabilizer (e.g. APC's Line-R 300VA, although that one is 120VAC)
Admire the fact that you have a very nice "Refrigerator Just Turned On" sensing system