Add F° and Basic Troubleshooting

docs/v4.md

@@ -227,7 +227,33 @@ For security's sake, it's best to change the default passwords immediately after
     - Install and set up [Wi-Fi antenna](wifi.md).
     - Install and set up [LTE/5G modem](modem.md) (**only for PiKVM V4 Plus**).
     - Set up [USB 3.0](usb3v4.md) (**only for PiKVM V4 Plus**).
+    - Choose Fahrenheit over Celsius to display on the OLED:
 
+??? note "How to set up Fahrenheit"
+
+        Create a directory for a configuration file:
+
+        ```console
+        [root@pikvm ~]# mkdir -p /etc/systemd/system/kvmd-oled.service.d
+        ```
+
+        Create file `/etc/systemd/system/kvmd-oled.service.d/override.conf`:
+
+        ```ini
+        [Service]
+        ExecStart=
+        ExecStart=/usr/bin/kvmd-oled --clear-on-exit --fahrenheit
+        ```
+
+        Then run `systemctl restart kvmd-oled`. In some cases, if you still do not see Fahrenheit being displayed, reboot the device.
+
+
+## Basic troubleshooting
+
+{!_basic_troubleshooting.md!}
+
+-----
+## Getting user support
 -----
 ## Known issues and limitations