diff --git a/post/board/lwmon5/dsp.c b/post/board/lwmon5/dsp.c
index 0e6d908..913cd97 100644
--- a/post/board/lwmon5/dsp.c
+++ b/post/board/lwmon5/dsp.c
@@ -33,20 +33,37 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#define DSP_STATUS_REG 0xC4000008
+#define DSP_STATUS_REG		0xC4000008
+#define FPGA_STATUS_REG		0xC400000C
 
 int dsp_post_test(int flags)
 {
+	uint   old_value;
 	uint   read_value;
 	int    ret;
 
+	/* momorize fpga status */
+	old_value = in_be32((void *)FPGA_STATUS_REG);
+	/* enable outputs */
+	out_be32((void *)FPGA_STATUS_REG, 0x30);
+
+	/* generate sync signal */
+	out_be32((void *)DSP_STATUS_REG, 0x300);
+	udelay(5);
+	out_be32((void *)DSP_STATUS_REG, 0);
+	udelay(500);
+
+	/* read status */
 	ret = 0;
 	read_value = in_be32((void *)DSP_STATUS_REG) & 0x3;
-	if (read_value != 0x3) {
+	if (read_value != 0x03) {
 		post_log("\nDSP status read %08X\n", read_value);
 		ret = 1;
 	}
 
+	/* restore fpga status */
+	out_be32((void *)FPGA_STATUS_REG, old_value);
+
 	return ret;
 }