diff --git a/troubleshooting.md b/troubleshooting.md
index 3337228..3b11bc8 100644
--- a/troubleshooting.md
+++ b/troubleshooting.md
@@ -10,11 +10,16 @@ title: "Troubleshooting Steps"
 
 ## Symptoms
 
-### Thonny shows error while flashing Micropython using Windows
+### Thonny shows error while flashing firmware (or Micropython) using Windows
 Possible causes:
   - Windows is blocking access to Espressif Serial device
 
-### Device manager alternates visibility of DevBoard from connected to disconnected
+### On Linux, the DevBoard device shows briefly and then disappears; the command ls /dev shows no DevBoard device
+Possible causes:
+  - USB-C resiptacle wasn't soldered properly; some pins have poor connection
+  - ESP32-S3 Module wasn't soldered properly; some pins have poor connection
+
+### Device manager alternates visibility of DevBoard device from connected to disconnected
 Possible causes:
   - Strapping pins pull-up resistors or capacitors are incorrect