G751 vibration feeling while touching metal back

[cdma2k]

thanks you very much. besides that, can this buzzing cause any serious problem for laptop? i was running laptop for 3 days before i noticed this problem and nothing seems to happened except probably cpu temp hitting 86C max.

wrong polarity or bad grounding happens all the time.When you buy a house, it is always a good idea to buy a CIRCUIT TESTER
to check the polarity of every outlet in the house.

[lukadjanelidze]

the funny part is that i asked my friends to try and tell me if they had the same vibration feeling when touching metal back and all of them said that im crazy and im making everything up

[clockworksatan]

I've felt a similar thing before on the brushed aluminium panels of HiFi equipment, so I know the exact feeling that you're talking about - but I doubt that it's worth worrying about.

[lukadjanelidze]

I've felt a similar thing before on the brushed aluminium panels of HiFi equipment, so I know the exact feeling that you're talking about - but I doubt that it's worth worrying about.

i've forgotten to mention that this "vibration" doesnt happen when laptop is not charging. anyway, i hope that its a minor problem.

[JustinThyme]

wrong polarity or bad grounding happens all the time.When you buy a house, it is always a good idea to buy a CIRCUIT TESTER
to check the polarity of every outlet in the house.

Codes vary from country to country and the only way you can test polarity 100% is with a meter and a ground source. If you look at the OPS sockets and plugs they are not even polarized like whats in the US now and everything could be wired correctly yet you are still able to connect devices in a reverse polarity configuration.. At one point even the US did not have polarized sockets and plugs. Now the Neutral connection is physically larger than the hot so you cant reverse polarity. Grounding in the US now is the most strictly enforced and hardest to understand part of the code book. The only time you have problems here now is when you buy a house that is either old or had someone add outlets that does not know how to do so and did not get it inspected.

@ OP did you try to reverse the plug in the socket 180? 90% of the time that's all you need to do. If you understand electronics and how charging circuits work its perfectly understandable why it would only happen with reverse polarity when it charges by looking at the schematic I provided. If you did reverse it and still have the problem its in your power brick, not grounding.

[lukadjanelidze]

Codes vary from country to country and the only way you can test polarity 100% is with a meter and a ground source. If you look at the OPS sockets and plugs they are not even polarized like whats in the US now and everything could be wired correctly yet you are still able to connect devices in a reverse polarity configuration.. At one point even the US did not have polarized sockets and plugs. Now the Neutral connection is physically larger than the hot so you cant reverse polarity. Grounding in the US now is the most strictly enforced and hardest to understand part of the code book. The only time you have problems here now is when you buy a house that is either old or had someone add outlets that does not know how to do so and did not get it inspected.

@ OP did you try to reverse the plug in the socket 180? 90% of the time that's all you need to do. If you understand electronics and how charging circuits work its perfectly understandable why it would only happen with reverse polarity when it charges by looking at the schematic I provided. If you did reverse it and still have the problem its in your power brick, not grounding.

yes i tried but it didnt work. i still feel vibration but only when its charging. i'll probably have to replace power brick.

[EttoreA]

Yes, maybe your power unit got a relatively large leakage current to grounded parts of your ROG notebook - chassy or exposed metallic parts. If that's the case unearthed plug/wall sockets at your home do not help for sure.

The question is, did wall sockets at your home get earth wires ? You said you live in Georgia so, I honestly don't know how things come there. In Europe or US, unless the device has been designed for double insulation - which is not the ROG notebook case - the earth wire to plug/socket is a must.

You may possibly see - if you ever have a chance to check it - what happens if you wire the ground pin of the ROG plug to an home radiator (for central heating) or to an oven pipe as these harnesses should be at earth potential.

[Weirdoutworld]

Yes, maybe your power unit got a relatively large leakage current to grounded parts of your ROG notebook - chassy or exposed metallic parts. If that's the case unearthed plug/wall sockets at your home do not help for sure.

The question is, did wall sockets at your home get earth wires ? You said you live in Georgia so, I honestly don't know how things come there. In Europe or US, unless the device has been designed for double insulation - which is not the ROG notebook case - the earth wire to plug/socket is a must.

What are the hardware risks of non-grounded outlets in the US? Also I'm kind of let down to learn ASUS rog power brick isn't double insulated... Little bit scary living in an old house...

[EttoreA]

What are the hardware risks of non-grounded outlets in the US? Also I'm kind of let down to learn ASUS rog power brick isn't double insulated... Little bit scary living in an old house...

The same hazards as the rest of the world; getting zapped at worst
However, I think you shouldn't worry for ASUS rog too much; more plastic than metal.
Rather it's your washing machine or freezer at your home if you live in old house with no grounded outlets.

[JustinThyme]

The ground wasn't added to prevent shock, it was added to connect a path for fault current if the mosfets take a dump. With no ground they will simply cook and melt the housing. Add a ground and a shorted mosfet will cause the breaker to trip or fuse to clear. The term doubled insulated is reserved for appliances and power tools. All it means is there are two layers of insulation between live parts instead of one.

As for non grounded outlets in the US the above applies to the laptop brick, it will cook. The housing is completely non metallic and non conductive. There are still hundreds of thousands of homes in the US without a grounded system. Is it a concern, yes but look at it this way. People went a very long time without ground outlets. Same applies, its there to provide a path to ground for fault current.

As for the OP try taking you laptop elsewhere and try it before buying a brick. One other culprit could lie in your electrical system of your dwelling. If the main neutral line is not bonded to earth ground this could cause it too.