Lightening damage - any hope?

Thanks for the comments and ideas. BTW, I do have everything powered thru a Furman power conditioner. And I checked the ground wire at the outside cable connection and it is as it should be. I bought additional media converters to isolate the Ethernet on my replacement/repaired gear that wasn't isolated. 

I found the fuse on the power supply of the Sony Blu-ray player and it is fine, but the service manual provided instructions to check 2 pins that connect the PS board to the main board for +12v and they both showed nuttin'. So, at least the PS board got zapped and possible more. I haven't a clue on how to repair the PS board and a replacement is $100. The player was only $500 and there they be more trouble if a new PS energizes the other boards and they don't work. Unless someone has a way to test the components on the PS board I guess I'll sell the unit for parts and get something else.

The Marantz is another can of worms. There are a number of boards stuffed on top of the main board and PS board such that disassembly will be quite a task. I think I'll take it to my excellent local repair shop and pay for a diagnosis.

Thanks again everyone.

Are you sure it was Ethernet issue and not power mains spike? It is pretty common for storms to cause voltage spikes. This is why I have surge protection for the entire home.

Now, have you checked fuses? They may have been blown.

None of the damaged items have 'regular 'fuses like an amp has. I suspect they are mounted on the circuit boards. Any hints on what to look for on the boards to identify a mounted fuse?

The damaged items are probably not worth repairing, but I'm taking this 'opportunity' to learn a little more about them.

Thanks for the help.

A little late to this thread but I identify with it.  Had a lightning hit last year, Hit a tree that was just 15 feet or so away from the underground electrical entrance.  Took out 2 TVs, 3 switches, 2 UPS, Router, and Bluesound box. Also took out the electrical meter and my solar system inverter.  What took out the TVs, Switches, Router, and Bluesound box was the LAN port.  Strangely enough the cable modem was ok. One of the UPS actually smoked.

My theory is that a large static electrical charge hit the LAN ports.  Most of them would power up but the LAN ports would not connect.  I have since added these devices to the incoming COAX and between the cable modem and the router:

LAN Lighting Suppressor

Coax Lightning Suppressor

I added the optical link between the router and Bluesound box mainly for noise reduction as it replaced a 50 foot ethernet cable run and for the protection.

Ethernet Media Converter

Fiber Patch Cable