How can I fix my proview ma982 monitor?

my proview ma-982kc 19"tft monitor has power but remains on a blank screen .I have seen on this site that I need to replace the capacitors but am unsure which ones to use. Do I use ceramic, electrolytic or other type?

Also, just as a note, my monitor works fine for a couple of hours when first used, then goes black. If i leave it for a couple of hours i can then use it for an hour and so on...does this happen when capacitors go?

Any help you can offer would be greatly appreciated