IBM HS12 Service Guide - Page 83
trained service technician., See Parts listing, Types 8014, 8028 and 1916 - ram
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v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See Chapter 4, "Parts listing, Types 8014, 8028 and 1916," on page 25 to determine which components are CRUs and which components are FRUs. v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Beep code Description Action 1-2-4 RAM refresh verification failed. 1. Reseat the DIMMs and the expansion unit if one is installed. v To reseat a DIMM, see "Removing a memory module" on page 44 and "Installing a memory module" on page 46. v To reseat an optional expansion unit, see "Removing an optional expansion unit" on page 37 and "Installing an optional expansion unit" on page 38. 2. Replace the following components one at a time, in the order shown, restarting the blade server each time: a. DIMMs - See "Removing a memory module" on page 44 and "Installing a memory module" on page 46. b. (Trained service technician only) System-board assembly - See "Removing the system-board assembly" on page 65 and "Installing the system-board assembly" on page 66. c. Optional expansion unit (if one is installed) - See "Removing an optional expansion unit" on page 37 and "Installing an optional expansion unit" on page 38. 1-3-1 First 64K RAM test failed. 1. Reseat the DIMMs. See "Removing a memory module" on page 44 and "Installing a memory module" on page 46. 2. Replace the lowest-numbered pair of DIMMs with an identical known good pair of DIMMs; then, restart the blade server. If the beep code remains, go to "Beep code descriptions" on page 69. Return one DIMM at a time from the failed pair to its connector, restarting the blade server after each DIMM, to identify the failed DIMM. 3. Replace the following components one at a time, in the order shown, restarting the blade server each time: a. DIMMs - See "Removing a memory module" on page 44 and "Installing a memory module" on page 46. b. (Trained service technician only) System-board assembly - See "Removing the system-board assembly" on page 65 and"Installing the system-board assembly" on page 66. Chapter 6. Diagnostics 71