diff --git a/Variant-NUNCHUK.md b/Variant-NUNCHUK.md
index 12936e1..f81de67 100644
--- a/Variant-NUNCHUK.md
+++ b/Variant-NUNCHUK.md
@@ -20,5 +20,7 @@ Proceed with [calibration](https://github.com/EFeru/hoverboard-firmware-hack-FOC
 If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Diagnostics)
 * On some boards the wire colors might differ, try switching blue and green cable
 * Keep cable short, use shielded cable, use ferrits, stabilize voltage in nunchuk
+* It could be the chip's ports are defective, or the resistors have been damages : do you have another board to try with ? This will help understand wether the problem is the board or the nunchuk
+