diff --git a/Source/HBIOS/cvdu.asm b/Source/HBIOS/cvdu.asm
index da4620fd..770a3f6d 100644
--- a/Source/HBIOS/cvdu.asm
+++ b/Source/HBIOS/cvdu.asm
@@ -272,7 +272,6 @@ CVDU_RDX:
 ; ON RETURN, ZF SET INDICATES HARDWARE FOUND
 ;
 CVDU_PROBE:
-	CALL	SPK_BEEP
 	; WRITE TEST PATTERN $A5 $5A TO START OF VRAM
 	LD	HL,0			; POINT TO FIRST BYTE OF VRAM
 	LD	C,18			; ADDRESS REGISTER PAIR