The issue relates to parts known as Residual Current Breakers with Overload, which are designed to work with other fuses to protect against electric shock.

The problem came to light during routine maintenance of the shelters and confidential council papers seen by the Evening Telegraph state the danger to the public is “very small” and the repairs are primarily being carried out to protect workers.

A spokesman for the local authority, which owns and operates the displays, said today the repair programme will be carried out over the summer.

He said, said, “Work will be starting shortly to repair all the bus shelters across the city.

“As part of this process, power to shelters, except those in the city centre and Ninewells Hospital, is being switched off.

“It is hoped they will be operational again sometime during the summer.”

Currently, only the screens at city centre stops and Ninewells Hospital are operational, but work to modify every shelter is expected to start on June 14.

A statement on Travel Dundee’s website said, “We have been advised that an electrical fault has been discovered on a number of these shelters.

“A long term solution has been identified by the council and work on modifying every shelter is expected to commence on June 14.

“They plan to have the majority of shelters switched back on by the end of July.”

There have been no recorded incidents of anyone suffering an electric shock whilst using or maintaining the shelters.

The leaked report, by city development director Mike Galloway, states that the authority is looking at the possibility of recovering the costs of the repairs from the contractor that installed the equipment.

He said, “Officers from the Sustainable Transport Team sought advice from the Street Lighting Partnership on how to rectify this electrical problem.

“Further investigation work has now identified the need for extensive repair and replacement of electrical apparatus.”

National Express Dundee director Lawrence Davie said he was “disappointed” at the situation and said he had urged the local authority to resolve the situation as swiftly as possible.

The difficulties have arisen as the bus operator continues to prepare for the introduction of a raft of new services on June 27.

Mr Davie said he had been assured that hard copies of the up-to-date timetables would be in place in all shelters citywide prior to the switchover, but said the travelling public could also access the information on the firm’s website.

He said, “We have information up on our website to keep the public aware of what is happening.

“We are pressing the council to resolve this as a matter of urgency as the public rely on real time information and we are disappointed it is out of use.”