IBM 72335LU - System x3850 M2 Installation Manual

Also see for 72335LU - System x3850 M2: User guide

Contents

Intermittent problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See the parts listing in the Problem Determination and Service Guide to determine which components arecustomer replaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.Symptom ActionA problem occurs onlyoccasionally and is difficult todiagnose.1. Make sure that:v All cables and cords are connected securely to the rear of the server andattached devices.v When the server is turned on, air is flowing from the fan grille. If there is noairflow, the fan is not working. This can cause the server to overheat andshut down.2. Check the system-error log or BMC log.USB keyboard, mouse, or pointing-device problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See the parts listing in the Problem Determination and Service Guide to determine which components arecustomer replaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.Symptom ActionAll or some keys on thekeyboard do not work. 1. If you have installed a USB keyboard, run the Configuration/Setup Utilityprogram and enable keyboardless operation to prevent the POST errormessage 301 from being displayed during startup.2. Make sure that:v The keyboard cable is securely connected.v The server and the monitor are turned on.3. Reseat the following components:a. Keyboardb. I/O board4. Replace the components listed in step 3 one at a time, in the order shown,restarting the server each time.The USB mouse or USBpointing device does not work. 1. Make sure that:v The mouse or pointing-device USB cable is securely connected to theserver, and the device drivers are installed correctly.v The server and the monitor are turned on.v Keyboardless operation has been enabled in the Configuration/Setup Utilityprogram.2. If you are using a USB hub, disconnect the USB device from the hub andconnect it directly to the server.3. Reseat the following components:a. Mouse or pointing deviceb. I/O board4. Replace the components listed in step 3 one at a time, in the order shown,restarting the server each time.Chapter 6. Solving problems 47