I wouldn't want to go through technician here in NY after their attempt to fix it, it costs alot more than you could imagine after i did one. For the safety of this player, it needs to go directly to the ones who made it, they have a better understanding of inner boards.
I honestly want to sell it off right now after having HDP R10, the unit has been replaced to look like new again, but it seems that they couldn't identify the problem with jack, if i remembered correctly they didn't find anything damaged with the board itself so i guess the problem comes directly from the glued output jack.
I see that you're selling this on eBay. Can you tell potential buyers how this final issue was resolved?