diff --git a/firmware/application/main.cpp b/firmware/application/main.cpp
index fb4c5e6a..1ae9fec3 100755
--- a/firmware/application/main.cpp
+++ b/firmware/application/main.cpp
@@ -657,15 +657,3 @@ context.message_map[Message::ID::FSKPacket] = [](const Message* const p) {
 
 	return 0;
 }
-
-void debug_indicate_error_init() {
-	// TODO: Indicate M4 error.
-	// led_usb.off();
-	// led_tx.off();
-}
-
-void debug_indicate_error_update() {
-	// TODO: Indicate M4 error.
-	// led_usb.toggle();
-	// led_tx.toggle();
-}
diff --git a/firmware/baseband/main.cpp b/firmware/baseband/main.cpp
index 2d577791..4e30e573 100755
--- a/firmware/baseband/main.cpp
+++ b/firmware/baseband/main.cpp
@@ -972,15 +972,3 @@ int main(void) {
 #endif
 	return 0;
 }
-
-void debug_indicate_error_init() {
-	// TODO: Indicate error, but don't import all of PAL (with init)
-	// led_rx.off();
-	// led_tx.off();
-}
-
-void debug_indicate_error_update() {
-	// TODO: Indicate error, but don't import all of PAL (with init)
-	// led_rx.toggle();
-	// led_tx.toggle();
-}
diff --git a/firmware/common/debug.cpp b/firmware/common/debug.cpp
index 2e758baa..5ae27f7a 100644
--- a/firmware/common/debug.cpp
+++ b/firmware/common/debug.cpp
@@ -22,6 +22,33 @@
 #include "debug.hpp"
 
 #include <ch.h>
+#include <hal.h>
+
+#if defined(LPC43XX_M0)
+static void debug_indicate_error_init() {
+	// TODO: Get knowledge of LED GPIO port/bit from shared place.
+	LPC_GPIO->CLR[2] = (1 << 2);
+}
+
+static void debug_indicate_error_update() {
+	// Flash RX (yellow) LED to indicate baseband error.
+	// TODO: Get knowledge of LED GPIO port/bit from shared place.
+	LPC_GPIO->NOT[2] = (1 << 2);
+}
+#endif
+
+#if defined(LPC43XX_M4)
+static void debug_indicate_error_init() {
+	// TODO: Get knowledge of LED GPIO port/bit from shared place.
+	LPC_GPIO->CLR[2] = (1 << 8);
+}
+
+static void debug_indicate_error_update() {
+	// Flash TX (red) LED to indicate baseband error.
+	// TODO: Get knowledge of LED GPIO port/bit from shared place.
+	LPC_GPIO->NOT[2] = (1 << 8);
+}
+#endif
 
 static void runtime_error() {
 	debug_indicate_error_init();
diff --git a/firmware/common/debug.hpp b/firmware/common/debug.hpp
index 7c7076c0..6b5323b7 100644
--- a/firmware/common/debug.hpp
+++ b/firmware/common/debug.hpp
@@ -22,8 +22,4 @@
 #ifndef __DEBUG_H__
 #define __DEBUG_H__
 
-// Defined by application to indicate error in board/hardware-specific manner.
-void debug_indicate_error_init();
-void debug_indicate_error_update();
-
 #endif/*__DEBUG_H__*/