Is this happening with the internal mic or an external mic when it is plugged in?
On Mon, Apr 19, 2010 at 7:00 PM, Peter van Houten <[email protected]>wrote: > Hello all, > > We have recently upgraded several of these laptops at a client. The > machines are old but not too badly specified, so it was decided > to upgrade to the max. The RAM to 2GB, the disks to 320GB and the O/S to > Windows 7. The users were delighted and all was well...except for an audio > problem. > > It occurs when recording sound from the mic input. Skype can trigger the > situation and is the application that uncovered the problem. It is a > continuous, low-level, [approx.] 500Hz whine (groan?) It is not a > feedback problem :-) The user couldn't hear the noise but the > people on the other end of the conversation were complaining. The > problem doesn't occur when simply playing audio, so it hadn't been noticed > previously. > > First test was to check a laptop that had not been upgraded. That > returned exactly the same fault. After that, we booted from an Ubuntu CD > to rule out the O/S and drivers and the same problem occurred. So, it is > hardware related and before we open one and start testing for bad caps, > ground loops and crispy spiders, has anyone else seen this? > > I have searched endlessly and found one *similar* problem on the HP > forum with no resolution. I am an electrical engineer and equipped for > (and comfortable with) all manner of hardware down to smt but I am > getting too old for this! > > TIA > -- > Peter van Houten > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
