After I while I decided to purchase a Plugable USB 2.0 to Gigabit Ethernet Adapter. It’s worked great ever since and as far as I can tell I haven’t had any new problems with the system (and bandwidth has clearly improved over the wifi connection). The device retails from Amazon for about $25.
Warning: Based on information provided in several posts, and from talking to friends, it is very possible that you could severely electrocute yourself if you don’t know what you’re doing or if you touch the wrong part of the electronics. If you’re not sure it’s safe to do this then simply don’t. When I replaced the board I was very careful not to touch any components, including the underside of the board I was replacing. Of course, the unit must be unplugged before proceeding and it may be a good idea to let it sit for a couple of days before opening it.
A couple of weeks ago we experienced a power surge from a nearby lightning strike that damaged one HVAC unit along with a few electronics. One of the items that was damaged was our older 32″ Philips LCD TV. This was largely my fault. I used to have a surge protector on that TV but the last one quit working and I forgot to replace it.
When we tried to turn the TV back on it wouldn’t work and I noticed that a red LED, near the power LED, flashed 6 times, stopped, and then flashed the same sequence.