Ab wrote:
My Dell Inspiron 1545 with Win 7 has an audio problem: the slightest
bump often causes the audio to mute completely and the only way I can
get audio back is to reboot. This has been a recurring problem for
quite some time. There are no driver or other warnings when this
occurs, in fact nothing happens except no audio. Any ideas would be
welcome. Watching videos can only be done if I don't make any sudden
movements and/or bump the laptop at all.

Thank you,
Ab
I don't know what it could be, but I would run a diagnostic for RAM and
the Hard Drive. It sounds like something is being lost from memory when
the bump occurs.