Title: Laptop Aluminum Casing Electric Shocks: Causes, Power Supply Issues & Voltage Details

Hello,

I have a problem with a laptop with an aluminum case near the keyboard. From the news, after a light touch with a finger, there was a tingling (when pressing the finger, there was no feeling). I didn't pay much attention to it. Recently, however, I feel like I've been electrocuted a few times. The laptop is connected to a grounded outlet. It seems to me that these shocks are only when the laptop is running on the power supply. What could be the reason? Is it the laptop itself or is it more of a power supply issue? The laptop is no longer under warranty, but probably service will not be avoided.

Another request - what voltage is possible on the case?
On the power supply I have the following information:
INPUT: 100-240V ~ 1.6A (1.6A) 50-60Hz
OUTPUT: 19.5V (19.5V) ---- 3.33A (3.33A)
These markings mean absolutely nothing to me. Can the current be high in the case of a "kick" through such an enclosure?
I've been using my laptop for a while :)

Thank you very much in advance for your explanations.

The socket may be sore. The question is whether it is connected to the PE wire and it is connected to earth.

Laptop brand and model?

HP Pavillion 15-n070sw

Problematyczna wrote:

HP Pavillion 15-n070sw

Problematyczna wrote:

with an aluminum housing next to the keyboard.

Nowhere in the descriptions or in the photos do you see any aluminum housing.

The keyboard housing is definitely not plastic. It is completely different to the touch than plastic.

@sosarek Another power supply with an EMC filter, the center of which the capacitors are connected, is connected to the ground of the output voltage, and without the possibility of connecting PE. If not the frame, the USB socket will "kick" They should add a ground wire with a crocodile to fasten it to the faucet or radiator Like in the washing machine "Frania".

On the website of the store where I bought it (a few years ago) I found information: "housing material aluminum
Plastic".
According to me (after touch) the general housing is plastic, and the keyboard circle is aluminum.

Added after 3 [minutes]:

Krzysztof Kamienski wrote:

@sosarek Another power supply with an EMC filter, the center of which the capacitors are connected, is connected to the ground of the output voltage, and without the possibility of connecting PE. If not the frame, the USB socket will "kick" They should add a ground wire with a crocodile to fasten it to the faucet or radiator Like in the washing machine "Frania".

What does "no PE connection" mean?
Sucks PSU in general?

@Problematic Maybe not a specific power supply, but this type of "design direction", because there are many of them. The mains plug of this power supply has a PE contact?

I mean that the socket may have a pin or may not have a PE wire connected, i.e. a yellow-green wire that is connected to the ground (earth). The pin itself will not give you anything and in order to fulfill its protective role it must be connected.

@Piotr160292 It's "another thing" . This is the design of the power supply.

If the "PE contact" is the place where the pin from the socket is placed, then it has.
Perhaps the socket itself, despite the pin, is not grounded. After a few electric kicks, I don't feel like trying other sockets
Regarding those kicks - how much current could there be on the case?

Krzysztof Kamienski wrote:

@Piotr160292 It's "another thing" . This is the design of the power supply.

Or ... I'm not saying that it's only the socket's fault