You can probably get a peek at it by just removing the cover, but it's partially hidden by the PS board. There's a "warranty void if removed" label covering one screw mounting the bracket that holds the fan and HDD, but I did not see one anywhere around the PS or HDMI connector.
To remove the cover you remove just the 4 screws in the back, slide the cover about 3/4" to the rear, then lift it off. That will give you a good view of a lot of the guts.
NOTE: I'm not recommending that you do this, leased or not! E* could take a stand that you're stuck with it once you open it, and on a leased unit they may try to collect damages. Your choice. But I think a quick peek is innocent enough (and if you're careful I don't see how they would ever know). Just remember to disconnect everything and don't touch anything while you're in there. You might be able to see some motion of a pin at the PCB if you very gently move the HDMI plug from outside while watching closely at the PCB. I wish I had done that on my first unit before I returned it, but at that time we were only speculating that there were broken/lifted pins and no one as far as I know had actually proved that condition to be true and actually effected a repair until recently. Live and learn!