The sound does not play during the playback of a video or audio file. November 25, 2020 05:52 Updated Open the Control panel and check that mute has not been selected. Related articles Can't hear the application's sound through the speakers. Content or a thumbnail is displayed in a color tone different from that of the original PDF (document), with a loss of an image, or as a blank page. 4.Using Content When copying text with the text copy function and pasting it into an e-mail or memo, line breaks are not reflected, and all the sentences are shown in connected. A modification to content by authoring is not reflected in the content displayed on the device.