diff --git a/inventoryManager.lua b/inventoryManager.lua
index 07b1dc5..24d9a10 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -195,12 +195,11 @@ local function main()
     end
 
     -- Billboard monitor (optional — set billboardMonitorSide in .manager_config)
-    if cfg.BILLBOARD_MONITOR ~= "" then
-        if display.setupBillboardMonitor() then
-            log.info("INIT", "Billboard monitor: %s", display.billboardMonName)
-        else
-            log.warn("INIT", "Billboard monitor not found: %s", cfg.BILLBOARD_MONITOR)
-        end
+    -- Billboard monitor (auto-detects any 3rd monitor, or set billboardMonitor in .manager_config)
+    if display.setupBillboardMonitor() then
+        log.info("INIT", "Billboard monitor: %s", display.billboardMonName)
+    else
+        log.info("INIT", "No billboard monitor found (optional)")
     end
 
     -- Find wired modem for client/turtle communication