I have no sound on my laptop (hp pavilion zv 5470us) it just went out. some times it will come back for a second or so then it will stop working again.
I have recently seen this problem on a laptop i fixed. The laptop speakers connectors had made a loose contact in his case. Looks like we have the same situation here. However I would suggest that you download the latest drivers and see if it resolves this issue. the speakers issue.
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?product=326406&lc=en&cc=us&dlc=en&lang=en&cc=us
Select your OS, download the audio drivers. Remove your old drvers and install the new ones.. Feel free to post back if it doesn't work so that we can deal ith
Since its flickering, It cannot be a problem with the software setup. It should be a problem, with the speaker connection which is connecting for a moment and then going off. Will advise you to take it to a technician who could have a look at its connection
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