IBM 86601RU Hardware Maintenance Manual - Page 299

System Board SCSI LEDs 5 blinks followed by a pause (DRAM address error) 6 blinks followed by a pause (Code block checksum error, flash the ServeRAID controller.) On (solid) FRU/Action a. Check cables b. System Board c. DASD Backplane 1. Run the ServeRAID Flash program. 2. Check cables 3. System Board 4. DASD Backplane 1. Check jumper J11, see "System board jumpers" on page 257. 2. Check cables 3. System Board 4. DASD Backplane Undetermined problems You are here because the diagnostic tests did not identify the failure, the Devices List is incorrect, or the system is inoperative. Notes 1. If you suspect a software mismatch is causing failures (solid or intermittent), be sure to see "Resolving configuration conflicts" on page 73. 2. A corrupt CMOS can cause undetermined problems. Check the LEDs on all the power supplies, see "Power supply LED errors" on page 278. If the LEDs indicate the power supplies are working correctly, return here and do the following: 1. Power-off the computer. 2. Be sure the system is cabled correctly. 3. Remove or disconnect the following (one at a time) until you find the failure (power-on the computer and reconfigure each time). Any external devices Surge suppressor device (on the computer) Modem, printer, mouse, or non-IBM devices Each adapter Drives Memory-Module Kits (Minimum requirement = 1 bank of 64 MB DIMMs) Netfinity 5500 - Type 8660 291