IBM 8835 Hardware Maintenance Manual - Page 91
microprocessor
UPC - 000435158314
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Note: See "System" on page 94 to determine which components should be replaced by a field service technician. Microprocessor problems Symptom FRU/action The server emits a continuous tone during POST. (The startup (boot) microprocessor is not working properly.) 1. Verify that the startup microprocessor is seated properly. 2. Startup microprocessor. Note: See "System" on page 94 to determine which components should be replaced by a field service technician. Monitor problems Symptom FRU/action Testing the monitor. v See the information that comes with the monitor for adjusting and testing instructions. (Some IBM monitors have their own self-tests.) The screen is blank. 1. Verify that: v The server power cord is plugged into the server and a working electrical outlet. v The monitor cables are connected properly. v The monitor is turned on and the Brightness and Contrast controls are adjusted correctly. v If the servers are C2T chained together, verify that: - The C2T chain cables are securely connected to the servers. - The C2T breakout cable is connected properly. - A server that is turned on is selected. Important: In some memory configurations, the 3-3-3 beep code might sound during POST followed by a blank display screen. If this occurs and the Boot Fail Count feature in the Start Options of the Configuration/Setup Utility program is set to Enabled (its default setting), you must restart the server three times to force the system BIOS to reset the CMOS values to the default configuration (memory connector or bank of connectors enabled). 2. If you have verified these items and the screen remains blank, replace: a. Monitor b. Video adapter, if installed c. System board Only the cursor appears. v See "Undetermined problems" on page 91. The monitor works when you turn on the server but goes blank when you start some application programs. 1. Verify that: v The application program is not setting a display mode higher than the capability of the monitor. v The primary monitor cable is connected to the C2T device breakout cable. v You installed the necessary device drivers for the applications. 2. If you have verified these items and the screen remains blank, replace the monitor. Chapter 7. Symptom-to-FRU index 81