ArthurS
Watch Those Blinking Lights
Premium
join:2000-10-28
Hamilton, ON
| reply to NYR 56
Re: Ground Loop?
This is a result of the computer manufacturer using the cheapest possible design for your laptop power supply.
And yes, your laptop *is* grounded if there are 3 prongs on the AC plug! What makes you think it isn't grounded?
Describe how you're hooking up your laptop to the TV. |
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NYR 56
join:2000-12-05
Smithtown, NY
clubs:
| The plug going into the laptop is only two wires (I believe) so how is that grounded? They make another power brick that doesn't even have the third prong but I stuck with the one that did.
It is connected to the TV using an s-video cable and a 1/8" headphone jack to RCA cable for the audio. I believe the problem is coming from the audio cable. |
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ArthurS
Watch Those Blinking Lights
Premium
join:2000-10-28
Hamilton, ON
| said by NYR 56  :The plug going into the laptop is only two wires (I believe) so how is that grounded? Simple, the output of the AC adapter is DC current, with one connection going to the chassis ground in the laptop, the other being positive voltage. The other power brick with only 2 prongs uses the neutral for the "ground" connection. No free lunch in either regard, you'll still have the same problem that comes as a result of the computer manufacturer being "cheap".
said by NYR 56 :It is connected to the TV using an s-video cable and a 1/8" headphone jack to RCA cable for the audio. I believe the problem is coming from the audio cable. Unplug the audio cable while the S-Video cable is still hooked up to the TV. If the buzz goes away, then the problem lies with the audio cable. If it's just the audio cable connection that is producing the noise, then I suggest you try one of these devices or something similar:
»www.jensentransformers.com/ci2rr.html
If the TV still buzzes with the S-Video connection maintained, then you'll need one of these devices or similar as well:
»www.jensentransformers.com/datas···h1ss.pdf
Otherwise, get a better built computer that doesn't cause interference with your TV set. |
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NYR 56
join:2000-12-05
Smithtown, NY
clubs:
| Good to know about the grounding, I totally forget it was switching over to DC (duh).
I guess I'll have to get one of those. The laptop was a fairly expensive business line Dell so you'd think it'd be of decent quality, kind of annoying it isn't. |
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ArthurS
Watch Those Blinking Lights
Premium
join:2000-10-28
Hamilton, ON | Yeah, disappointing but not surprising from Dell. You could try a third party universal AC adapter with your laptop to see if the problem goes away, though I wouldn't have high hopes that Dell didn't "cheapen" their audio output section either. |
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