New technology has left the hearing-impaired in the dark when it comes to watching their favourite television programmes.New fibre optic equipment installed by the Bermuda Broadcasting Company (BBC) has resulted in its closed captioning service — in which the dialogue of a TV show appears printed on the screen — going off the air.In a letter to The Royal Gazette, one resident explained: “Since my husband is hearing-impaired, we have closed captioning on all of our channels, as this is the only way he can watch TV.“When ZFB and ZBM switched to a digital signal, the captioning stopped working.“We have checked CableVision and over the air signals and neither are supplying the closed captioning. I called BBC and someone was supposed to ‘look into it’ and get back to me. That was two months ago.“We know that the US feeds that they are using are required to carry the closed captioning signal by law in the US so they should be available in Bermuda as well.”Last night BBC CEO Rick Richardson confirmed the technical glitch arose when the BBC switched to digital and changed the method of feeding the signals to CableVision to fibre optic.He said that engineers were now working to correct the fault, but could not say when normal service would be resumed.