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Hello and sorry you're having problems. In most cases, no you cannot simply replace the ports and expect the problem to be gone. The HDMI ports carry 5 volts of bus power and even a loose jack can cause an arc and a failure upstream or downstream on the Digital Main. Since you're also losing the ability to view non-HD channels, have eratic sound, and the HDMI ports are not working- I would strongly suggest replacing the Digital Main in the set. I've found one at the link below for $74 and change:
If you need further assistance let me know. Please do not forget to click the 5 STAR RATING, at the top of the page for my efforts. It is my livelihood and you can follow up at any time if needed.
Do you need further assistance with this?If not, could you please click the 5 STAR RATING, at the top of the page for my efforts? It is my livelihood and you can follow up at any time if needed.