TAIPEI - Taiwan said on Wednesday it was investigating a massive power blackout that hit businesses and residential homes, affecting close to seven million households on the heavily industrialised island amid sweltering heat.
President Tsai Ing-wen apologised for the crisis which left millions of homes without power and hit offices and factories on the island of nearly 24 million people late on Tuesday.
The worst appeared to be over by Wednesday afternoon, with power fully restored and little impact on Taiwan's leading technology manufacturers.
Taiwan Semiconductor Manufacturing Co (TSMC), the world's largest contract chipmaker and a major supplier to Apple Inc, said its operations were not affected, as did electronics manufacturer Pegatron Corp.
ChipMOS Technologies Inc said the outage did not have a big impact on its operations. Its shares fell 2 per cent in early trade but pared losses later to 1 per cent, lagging a flat broader market.
Premier Lin Chuan promised to seek an external review of the island's power supply network, and take questions in person at the legislature.