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What's This Screeching Sound & Why Does it Occur?

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JGrubbs
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Memory Info
JGrubbs   2/21/2017 11:31:55 AM
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Here is a link to the Service Manual for the dc5750.

http://h20566.www2.hp.com/hpsc/doc/public/display?sp4ts.oid=3252512&docLocale=en_US&docId=emr_na-c00803472

Appendix F has info on the memory supported, it shows 256MB, 512MB and 1GB DIMMs.

Don't know 2GB DIMMs are the problem.

 

MeasurementBlues
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Re: Memory Info
MeasurementBlues   2/21/2017 12:48:20 PM
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JGrubbs,

Thanks for the link. It's quite possible that the PC doesn't support 2 GB DIMMs. I found 1 GB DIMMs online at $17 each, but then need four of them. Total $68. The person paying may not want to spend that much given that the PC is used mostly for email and a little browsing on a dialup connection. The benefits may just outweigh the costs.

Max The Magnificent
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Screeching Sound
Max The Magnificent   2/22/2017 10:23:28 AM
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@MeasurementBlues: When I saw the title to this column -- What's This Screeching Sound & Why Does id Occur -- I thought you were talking about when my wife comes home and sees one of my hobby projects scattered around the family room LOL

MeasurementBlues
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Re: Memory Info
MeasurementBlues   2/22/2017 6:39:06 PM
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I ordered 4x1GB DDR2 DIMMs from Crucial.com. Hopefully, this will work.

MeasurementBlues
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Re: Screeching Sound
MeasurementBlues   2/22/2017 6:40:44 PM
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@Max,

"when my wife comes home and sees one of my hobby projects scattered around the family room LOL"

If I saw you scattered around my family room, I'd screech too. But then again, I don't have a family room.

jnissen
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Re: Screeching Sound
jnissen   2/28/2017 2:16:58 AM
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Do the sounds only come from the speaker or the power supply? If the switching supply were struggling with the new memory and the switching rate were in the audible range then that could account for the noise. Not sure why a sound board and such would start screeching unless the supply were taxed and you now have more supply ripple with the heavier load.

As a precaution leave your cell phone on the other side of the room. My older PC freaks out when the phone causes my speakers to chirp and pop.

MeasurementBlues
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Re: Memory Info
MeasurementBlues   2/28/2017 6:11:31 PM
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jGrubbs

A set of 4 x 1 GB DDR2 modules just arrived. I'll install them over the weekend.

 

JGrubbs
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Re: Memory Info
JGrubbs   2/28/2017 11:29:00 PM
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MeasurementBlues

Hope the 4 x 1 GB ram modules fix the problem.

When I went from Win 8.1 to Win 10 the audio volume would randomly jump to 100%.

Updating the audio drivers corrected the problem.

David Ashton
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Re: Memory Info
David Ashton   3/1/2017 3:11:04 AM
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Martin I had a similar upgrade not too long ago on my Win 7 PC.  I think much the same kind of memory (DDR2).  It said it could take up to 8GB of RAM, so I purchased 4 x 2GB sticks.  It works, but only 4 GB appears on the POST message, and is usable.  The strange thing is that if you look in my computer / System Properties, it says 8.00 GB (4.00 GB Usable).  If it knows it's there, why can't it use it?  4GB is better than the 2GB I had before, so I live with it.

Old story....to err is human, to really foul things up takes a computer....

How did your upgrade go??

 

JGrubbs
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Re: Memory Info
JGrubbs   3/1/2017 11:22:12 AM
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David

WIN 7 32 bit version addresses only 4 GB , WIN 7 64 bit addresses 8, 16, or 192 GB depending on which version ( Home Basic, Home Premimum or Professional). You can set up a RamDisk with the other 4 GB for pagefile and other temporary files.

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