Four raiders, two wielding knives, escaped with nearly HK$3 million worth of LCD monitors from a warehouse in Tsuen Wan yesterday - the second large theft of hi-tech equipment in a week. They threatened a male attendant on the 12th-floor warehouse of Global Gateway (Hong Kong) in Yeung Uk Road shortly after midnight, tied him up and ransacked the premises before taking away 504 cartons of LCD monitors. Last Monday, burglars stole partly assembled LCD monitors worth HK$9.36 million from a warehouse in Yuen Long.