> ## Documentation Index > Fetch the complete documentation index at: https://docs.flexwash.com/llms.txt > Use this file to discover all available pages before exploring further. # Tunnel Tablet Issues > Keep cars moving by quickly diagnosing a stalled tunnel tablet. The tunnel tablet runs the [Wash Queue](/operations/transactions/wash-queue) and polls your FlexWash Coordinator continuously for the latest queue. When it cannot reach the Coordinator, the tablet cannot load cars and washing stops. ## Recognizing the Problem The most common sign is an error on the Wash Queue screen: Error loading queue You may also see the page fail to open at all. Both point to the same root cause: the tablet cannot reach the Coordinator. ## Isolating the Issue Because the tablet depends on a live connection to the Coordinator, the failure almost always falls into one of three categories: * **Bad network signal.** If the tablet is on WiFi, weak or intermittent signal can drop the connection. * **Bad wire.** If the tablet uses ethernet, a faulty cable or port can break the connection. * **Coordinator offline.** If the Coordinator is down, no device on the network can reach it. ### Test the Network Connection Connect a different device to the same network connection the tablet uses and try to open the [Wash Queue](/operations/transactions/wash-queue#link). If the second device also fails to load the queue, the problem is with the network/wire or the Coordinator, not the tablet. ### Test Internet Access From that same device, try to open any public website. * **The public site loads.** Your network is working, so the issue is with the Coordinator. Continue with the support steps below. * **The public site fails.** The network itself is down. Check the WiFi signal or the ethernet wire and port. ## Next Steps If the network is healthy but the Coordinator is unreachable, the problem is on the Coordinator. See [On Prem Issues](/technical/troubleshooting/prem-issues).