I just owned a desktop PC and as display I connected my TV through HDMI cable.
Today I changed the HDMI cable to one that can handle 4K resolutions. So I disconnected the old HDMI cable and then with the new cable I connected first the PC side and the the TV side and I got a spark in the metal part of the HDMI plug when I was trying to connect it. Also if I touch the TV HDMI port a get a little shock in my finger.
The TV only has a 2 prong power cord, so it doesn't have the earth pin.
Does this is potentially dangerous to my PC?
I've read this in different forums but there are very spreaded ideas:
- It is very risky and that could fry the GPU.
- The earth pin is not necessary because the TV has plastic case (I know that ground is needed to avoid electric shocks to users when live wire touches the chasis but this is not the case)
- Coax cable can be the best way to ground a TV (if it has 2 prong plug cable)
- Some manuals (of TV with 2 prong plug cable) says that to connect an HDMI device everything needs to be powered off and unplugged from any source to make the connection (this makes sense so the TV will be grounded with the HDMI cable so no shocks and fried GPUs)
- Nothing will happen those sparks will be uncharged by the grounded device.
Any of these Ideas are true? (Especially #4)
I really don't know if is safe or not to connect all again.
Thanks in advance.
Just to give more information...
The TV and PC are connected to AVR outlets of a voltage regulator. Also a modem and a Nintendo switch dock are connected there.
The modem has a phone line that is plugged into the voltage regulator phone line protection.
The Voltage regulator has 1000W capacity. And the outlet where is connected is grounded properly.
The TV and modem are connected through Ethernet cable. Also the Nintendo Switch dock is connected through HDMI cable. Nintendo switch dock does not have earth pin.