One of England's largest onshore wind farms is out of action because of a faulty part.
Owner Electricity Supply Board (ESB) said the 22 turbines at Fullabrook Down near Ilfracombe, Devon could be off for weeks.
The firm said a part had been ordered but the turbines would be out of action while it was being delivered.
The 110m (360ft) tall turbines could produce enough electricity for about 30,000 homes says ESB.
ESB, parent company of operators Devon Wind Power, said in a statement: "Fullabrook wind farm was taken off line on 24 May to carry out planned testing of electronic systems.
"Testing takes place on a regular basis.
"It was during this testing that an issue arose which necessitates the replacement of a component.
"Devon Wind Power expects the wind farm to return to full service by the end of the month."