diff --git a/Troubleshooting.md b/Troubleshooting.md
index bb91c30..05c1236 100644
--- a/Troubleshooting.md
+++ b/Troubleshooting.md
@@ -6,7 +6,7 @@ The board is not turning on, you hear the power stage buzz noise but no melody
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 The board is not turning on, you can't hear the power stage buzz noise, and no melody
-* the first TIP127 mosfet might be defective
+* the top TIP127 mosfet might be defective (Q2 in [schematics](/docs/20150722_hoverboard_sch.pdf))
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 The board is turning on as soon as the battery or charger is connected