The problem is preventing passengers from being processed through security causing huge queues to form throughout the affected terminals.
Long lines filled the global terminal and one of two domestic terminals on Friday after an "underlying technology issue" was discovered before opening.
Passengers are seen waiting in line due to hardware and technical issues at the Domestic Airport in Sydney, March 9, 2018.
'Arrivals into Sydney are running as usual, and departures are expected to be operating as normal from midday onwards, ' he said.
"There may be some delays as a result, however passengers are advised to arrive at the airport as planned for their upcoming Virgin Australia flights". Almost 16 million of those were worldwide passengers, with those from China being one of the major sources of travellers, according to airport figures.
"We're advising passengers and visitors to avoid T1 and T2 until further notice", a Tweet from Sydney Airport said at 6:08am.
It affected systems including the airport's CCTV, meaning passengers could not be screened for about two hours.
The T3 Domestic terminal, which is operated by Qantas, was not affected.
Virgin Australia flights were also recovering from significant delays, which included two cancellations.
The Airport alerted travellers to the issue on Twitter, urging them to avoid Terminal 1 and Terminal 2 as they work to resolve the issue.
ACC Tournament Preview: Players to watch
Pitt has lost 22 straight ACC regular-season games going back to last season, four short of Clemson's record of 26 from 1954-56. U.Va., which opens the ACC tournament Thursday in the quarterfinals against Wednesday's victor of No. 8 seed Florida State vs.
More snow on the way
Winds are forecast to gust up to 25 miles per hour in the James River Valley, and blowing and drifting snow is expected. However, the latest model runs keep the bulk of the storm off the New England Coast with a minimal impact on CT .
Senate committee passes ban on marriages involving minors
I'm talking to Democrats. "A gun, like any other source of power, it is a force for good or evil", he said. He said , if that scenario occurs, we'd return to square one: the 2-1-1 pay raise signed by Gov.