I sent my motherboard for a warranty replacement, but the request was rejected due to burn damage. The issue occurred after I connected an HDMI-to-VGA converter for an old monitor. The converter had its own power adapter, and I believe this external power supply damaged the HDMI chip on the motherboard.

After that, I took the board to a local technician ("Technician A"), who said he couldn’t repair it. Finally, I brought it to a more experienced technician ("Technician B"), who discovered that the HDMI chip was missing from the board.

Now, I need...