@stephenw10
Hello Stephen, thank you for the feedback.
I read about the part here :
https://www.marvell.com/content/dam/marvell/en/public-collateral/transceivers/marvell-phys-transceivers-alaska-88e1543-product-brief-2012-07.pdf
I am not an electronics expert but what I read mentions only the eithernet ports, so yes, replacing it might not fix the problem completely.
My friend indicated that from the start but at this point, it might be worth the TRY if the part and labour are not too expensive.
I will keep you posted, thank you.
Jean-Pierre