If the TV is on, querying on http://IP:8000, you get the response:

Server is running...

If the TV is on, querying on http://IP:8001/ms/1.0/, you get a response like:

{
  "DUID": "08f0d181-0096-1000-82d5-c4576e33a21d",
  "Model": "14_X14_BT",
  "ModelName": "UE48H6500",
  "ModelDescription": "Samsung TV RCR",
  "NetworkType": "wired",
  "SSID": "",
  "IP": "192.168.0.180",
  "FirmwareVersion": "Unknown",
  "DeviceName": "[TV]Samsung LED48",
  "DeviceID": "08f0d181-0096-1000-82d5-c4576e33a21d",
  "UDN": "08f0d181-0096-1000-82d5-c4576e33a21d",
  "Resolution": "1920x1080",
  "CountryCode": "BE",
  "SmartHubAgreement": "true",
  "ServiceURI": "http://192.168.0.180:8001/ms/1.0/",
  "DialURI": "http://192.168.0.180:8001/ws/apps/",
  "Capabilities": [
    {
      "name": "samsung:multiscreen:1",
      "port": "8001",
      "location": "/ms/1.0/"
    }
  ]
}

When the TV is Off (powered off or in standby mode), you won’t get any response from those ports but:

ERR_CONNECTION_TIMED_OUT