HDMI Port Not Working After Fuse Blow on TV Without Proper Earth—Repair Steps?

Hello. Im new so I just ask a simple question.

My power outlets dont have earth and my extension cord has earth and - together.

So I powered my tv on and everything worked fine, attached antenna and still everything works. but then I attached my HDMI cable and boom, 16A fuse blew. Removed the antenna but hdmi was still conencted. Then I powered TV on again and attached antenna. boom fuse blew again. now my TV wont reconize HDMI anymore. First it says no cable connected. Then I attach the HDMI cable and It shows No signal. So it reconizes that something is attached but no signal. With other TV hdmi works. I took my tv appart and 2 diodes showed 0.001 with my multimeter so I replaced them with almost same ones. And still no signal. Power board is working fine and I see no burned areas or blew up capasitators. Is it possible to revive hdmi signal somehow?

I am 4 year electical engineer so just tell me where to look or am I missed something.

First off, is everything connected to the same extension cord (the one with - and earth together)? This includes the other device on the HDMI cable.

I suspect that you have a serious "ground loop problem" if you are blowing a 16A fuse. And since the thing that triggered it was plugging in the HDMI, I suspect that a significant portion of the 16A was flowing through the HDMI cable.
I'd recommend that you NOT use a extension cord with - and earth tied together. If your building does not have an earth connection, there's nothing to prevent the - from outlet A from being at a different potential from the - at outlet B. Back when I lived in a house with no earth on the power outlets, I used power strips to provide  "local" grounding. If you have metal outlet boxes, you may be able to ground to the outlet box but check that the outlet box is ground first...

Hi selimahope-If you blew a 16A fuse, this is more than a ground loop problem.  I think line and neutral were reversed either in the extension cord or in the receptacle that it was plugged in to.  This causes an EXTREMELY dangerous situation, because the chassis of all of the equipment plugged into the extension cord would be "hot".  Sorry you damaged the HDMI input, but that HDMI cable may have saved your life!As far as repairing the HDMI port- you probably took out one of the big ASIC chips.  The question is- which end of the HDMI connection is damaged?  It could be the port on the TV or it could be the other end of the HDMI link. You can often buy a replacement circuit board for the TV for a low cost.  My favorite source for flat screen TV repair parts is ShopJimmy.com  -Rick