If one of them fixes the loudspeaker on Friday if it malfunctions during the sermon, is it considered invalid?

Question:
He says: Honorable Shaykh, may Allah grant you success, if the imam is in the Friday sermon and a malfunction occurs with the loudspeaker, is it permissible for anyone in the congregation to fix it without the Friday prayer being considered invalid, or must the imam order him to do so? What he does is fix it, but one of the worshippers should announce the takbir.

Answer:
He announces the takbir from behind him; when the imam says takbir, he says it and raises his voice so that the people can hear him. He says: If a malfunction occurs with the loudspeaker in the Friday sermon, is it permissible for any of the ma'mum to fix it, or must the imam order him? No, it is not a condition that the imam knows that someone is fixing the device; he goes ahead and fixes it, may Allah reward him with good. This is cooperation in righteousness and piety. And is it considered invalid? No, it is not invalid in this case; this is due to an excuse and a need.