Businesses and residents in Sudbury were plunged into semi-darkness on Saturday during a power cut.
Shop workers in North Street said they first lost power at around 10.20am when lights went out and tills lost power for about a minute.
This happened two more times throughout the course of the morning, with shopkeepers having to reboot their tills each time.
A spokeswoman for UK Power Networks said the blackouts were caused by a fault underground.
“The majority of customers had their power restored at 11.07am and the final 67 had their electricity supplies restored by 1.43pm following the fault on an underground cable,” she said.
“We understand how difficult it can be to be without power and apologise for any inconvenience caused.”
At Rafi’s Spicebox in North Street, sales assistant Sharon Maloney said she was serving a customer when the electricity first went down.
“It only lasted about a minute,” she said. “The till went down and we just had to reboot it.”
Some stores in the town were forced to close and others were taking cash payments only until engineers from UK Power Networks were able to fix the fault.