More than 40 town centre shops and businesses were hit by a power cut caused by an underground cable fault on Monday morning.
Hand-written notices were stuck on front windows and doors by staff, alerting customers that the premises were temporarily closed because of the problem.
The affected area included Fazakerley Street and Cleveland Street at the bottom of the covered market.
Electricity North West owns, operates and maintains the region’s electricity distribution network, connecting 2.4 million properties, and more than five million people to the National Grid.
A spokesman said yesterday: “An underground cable fault caused the loss of power to 41 customers at 11.22am this morning.
“Our engineers quickly arrived on site and are working to locate the fault and restore supplies as soon as possible.”