diff --git a/drivers/video/video-uclass.c b/drivers/video/video-uclass.c
index a8f4fc5bd4b..068653ced8d 100644
--- a/drivers/video/video-uclass.c
+++ b/drivers/video/video-uclass.c
@@ -632,12 +632,35 @@ void video_set_white_on_black(struct udevice *dev, bool white_on_black)
 	}
 }
 
+/* TEMPORARY bring-up diagnostics (krane Round 20) — do not upstream:
+ * paint a band into the live depthcharge scanout. */
+static void krane_diag_band(u32 y0, u32 rows, u32 color)
+{
+	u32 base = readl((void __iomem *)0x14008f40);
+	u32 *p, n = rows * 1200, i;
+
+	if (base < 0x40000000)
+		return;
+
+	if (dcache_status())
+		mmu_map_region(base, 0x8ca000, false);
+
+	p = (u32 *)(uintptr_t)(base + (u64)y0 * 4800);
+	for (i = 0; i < n; i++)
+		p[i] = color;
+
+	if (dcache_status())
+		flush_dcache_range((uintptr_t)p, (uintptr_t)(p + n));
+}
+/* end TEMPORARY diagnostics */
+
 /* Set up the display ready for use */
 static int video_post_probe(struct udevice *dev)
 {
 	struct video_uc_plat *plat = dev_get_uclass_plat(dev);
 	struct video_uc_priv *uc_priv = uclass_get_priv(dev->uclass);
 	struct video_priv *priv = dev_get_uclass_priv(dev);
+
 	char name[30], drv[15], *str;
 	const char *drv_name = drv;
 	struct udevice *cons;
@@ -676,7 +699,14 @@ static int video_post_probe(struct udevice *dev)
 
 	priv->white_on_black = CONFIG_IS_ENABLED(SYS_WHITE_ON_BLACK);
 
-	/* Set up colors  */
+	if (!CONFIG_IS_ENABLED(NO_FB_CLEAR))
+		video_clear(dev);
+
+	/* TEMPORARY bring-up diagnostics (krane Round 20) — do not upstream:
+	 * cyan band right after the clear: if visible, the clear and the
+	 * fb mapping work and death happened later in this function. */
+	krane_diag_band(260, 60, 0x00ffff00);
+	/* end TEMPORARY diagnostics */
 	video_set_default_colors(dev, false);
 
 	if (!CONFIG_IS_ENABLED(NO_FB_CLEAR))
@@ -740,26 +770,10 @@ static int video_post_probe(struct udevice *dev)
 		uc_priv->cyc_active = true;
 	}
 
-	/* TEMPORARY bring-up diagnostics (krane Round 19) — do not upstream:
-	 * paint a white band right after the vidconsole is up, so a crash
-	 * between the framebuffer clear and the banner can be seen. */
-	{
-		u32 base = readl((void __iomem *)0x14008f40);
-
-		if (base >= 0x40000000) {
-			u32 *p;
-			int i;
-
-			if (dcache_status())
-				mmu_map_region(base, 0x8ca000, false);
-			p = (u32 *)(uintptr_t)(base + 200 * 4800);
-			for (i = 0; i < 60 * 1200; i++)
-				p[i] = 0x00ffffff;
-			if (dcache_status())
-				flush_dcache_range((uintptr_t)p,
-						   (uintptr_t)(p + 60 * 1200));
-		}
-	}
+	/* TEMPORARY bring-up diagnostics (krane Round 20) — do not upstream:
+	 * paint a white band once the vidconsole is up, so a death between
+	 * the framebuffer clear and the banner can be localized. */
+	krane_diag_band(200, 60, 0x00ffffff);
 	/* end TEMPORARY diagnostics */
 
 	return 0;