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Loud whistle on set top box going to standby
Since the software upgrade, every time we put the box into standby, we get a loud piercing whistle through the TV speakers - it is a short duration, about 0.25 second but extremely irritating. I have powered down the box but that has made no difference. No other changes have been made to the set up apart from the new software.
Have been holding on the phone for ntl "support "over 25 minutes and need to go to work.
Anyone any ideas?
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