Someone help please...My monitor starts giving off a strange continuous "beep" after about an hour of usage. The beep stops if the monitor is switched off, but starts once again if the monitor is switched. The beep continues till the system is re-booted. Cud someone please explain as to why this is happening? What can I do to avoid the irritating beep? BTW, I have a LG 17" monitor (model num: 700E) Thanx.