Updated Troubleshooting Guide (markdown)

Troubleshooting-Guide.md

@@ -12,6 +12,7 @@ This page sums up the most frequently encountered issues for different wireless
 | SX126x/8x failed to initialize | -706 or -707 | [Incorrect oscillator selected](https://github.com/jgromes/RadioLib/wiki/Troubleshooting-Guide#sx126xsx128x-incorrect-oscillator) |
 | ESP32/ESP8266 interrupts do not work | N/A | Missing `IRAM_ATTR` from user-provided interrupt service routine. This is a property of the ESP32/ESP8266 architectures when using Arduino and has nothing to do with RadioLib, see [espressif's documentation](https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/memory-types.html#iram-instruction-ram). |
 | No downlink after LoRaWAN uplink | -1116 | Not all uplinks to LoRaWAN server result in a downlink. This is not a problem, but rather a common behavior in LoRaWAN. |
+| Output power lower than configured | N/A | Overcurrent protection is likely set to the default value (change it by `radio.setCurrentLimit()`). This can also be caused by insufficient power supply. |
 
 ## Hardware issues