Help, Lost connection to OMV

I hope someone can help me. Since this morning I could not connect to my OMV box. I usally check my transmission bt progress but this morning I could not see any downloads on the web interface. I navigated via the OMV web gui and there in the transmission BT plugin everything was empty. I thought the plugin froze and I rebooted.
Since the reboot I could not contact the OMV box via LAN. The device boots because I can log in via its CLI. I cannot ping OMV from my laptop. I thought the port went faulty. For some reason the omv box wakes up from LAN command but I cannot ping the device at all.
What can be the issue here. I have tried the omv-firstaid cli command and confirmed the ip addresses on the NIC. I even added another NIC to see it that would help but I can not ping either devices.
Please help..

So, I put in an empty hdd and loaded a fresh copy of OMV. The lan works and I can open webgui. I power down and put former HDD back. I boot and no connection via lan again. I cannot ping from windows laptop. What the hell is going on. This OMV os is broken.

@omavoss, Yes, I used another cable, no go. I tried to ping router & laptop from omv: it just says:network unreachable.

That took some effort but there are a few errors, not sure it they mean anything:

It seems I lost my NIC configuration. When I run omv-firstaid in the cli, it spits out a lot of errors when I try to change the ip address. How can I trouble shoot the issue further? I also successfully transferred an OS disk to another clean disk using Acronis true image. I did this in a virtual machine environment but I am sure it will work on a real disk. I will test that soon to try and salvage my real OS disk.

Yes, I checked that. Even when I restored the acronis image from the physical disk to a VM, I could not access OMV via the network. It wouldn't even allow me to change the IP address via omv-firstaid. Some config file that has to do with the nic is corrupt ...

Yeah, I want to but I got around 150gb pending torrents going. I'm replicating the data as we speak so I can try and resume the torrents on a new installation.

Its weird though, the old laptop with windows & utorrent were more reliable...

Ok, I reinstalled OMV and it worked for a week. Now I have the same problem again this. Please look at my log when trying to change the ip address from omv-firstaid. Is my hdd corrupt?

The NIC is brand new. I loaded a new hdd with omv. Lets see

I am sorry to say but it happened again. First Transmission bt stops working. Ping still works. Then when you reboot, you loose all communication to OMV box. I am losing faith in OMV.

The motherboard is a 915GLM-V.
The NIC is a TP-link TG-3269.
See pic for response on output.

OK, I will try that. What is strange is that the onboard is also a realtec chip. This issue also happened with the oboard NIC ...