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Humming Sound On Dialup Slows Surfing To Snails Pace

H

hackmole

Senior member
After installing my modem which was working perfectly into another computer, I'm getting a humming sound on dial up. The sound comes either in two ways, a regular lower pitched humming or a very high pitched humming. It slows my net surfing to a snails pace and would often just stop. I tried everything I could think of but finally just gave up and took the modem out and put it back in my old system. In my old system it works perfectly. No strange sounds on dialup and no lagging slow surfing. I can't imagine what could cause those humming sounds and how one system could be so different than another.
 
Try moving the modem to a different PCI (I assume) slot. It seems that the modem is picking up some interference. Also, try the modem in the new PC plugged into the same jack as when the modem is in the old PC. (Maybe there is something external interfering with the phone line where the new PC is located... If you are using the same jack as the old when, just forget everything I wrote...😉 )
 
Thank you for your response. I already did try using another ISA slot and use the same jack as I just transfer the connections and don't change the wall plug. But yes, there does seem to be some kind of interference and I am wondering if it might have something to do with the power supply or maybe fan not being grounded properly though I really don't even know how a power supply is grounded.

 
The power supply is grounded through the power cable to the wall outlet. If you have it unplugged from the wall it should be a three prong plug (male) on one end and a three hole receptacle (female) on the other. The prong that is in the middle is the ground. Inside the power supply, there is a wire that is electrically bonded to the metal. Since the metal of the power supply is (typically) physically bonded to the metal of the case with metal screws, you should (in theory) have good electrical connectivity through the whole chassis. You can pick up an inexpensive outlet tester at your local home improvement mega-super-store or Radio Shack. THis simple widget plugs into the wall and through a series of indicator lamps, lets you know if your outlet is working.

Is your computer plugged into a power strip? If so, plug the computer directly into the wall and see if you get the same result. I have seen problems where a power strip was plugged into a batter back-up (UPS) and there would be interference between the two devices that caused problems with the computer (but only when the printer was on!) It's a trial and error process, but you may discover something very simple.

You could always pick up another modem as well... Just a thought...
 
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