IBM 86803RU Hardware Maintenance Manual - Page 213

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 36. 2. A corrupt CMOS can cause undetermined problems. Check the LEDs on all the power supplies, see "Power Supply LED Errors." on page 194. If the LEDs indicate the power supplies are working correctly, do the following: 1. If a component has been added, reseat the added component and components around it, and retest. 2. If the system has been moved recently, reseat all the components and retest. 3. Check the LEDs on the processor board, see "Processor Board Component Locations" on page 165. a. Check the 2.5V LED; if not on, replace processor board. b. Check the VRM error LEDs. There are two VRMs per processor. For the VRM LED to be off, a good processor and two good VRMs (A and B) must be installed. If a LED is on: 1) Replace VRM A and VRM B. 2) Replace the processor. c. Check Termination LED. If not on: 1) Ensure a processor card is in slot 1 and a processor or terminator is in slot 4. 2) Reseat Processor/terminator in slot 4. 3) Replace Processor/terminator in slot 4. d. Check Power Good LED (Verify jumper J5 is on pins 1 & 2, default positions). If not on: 1) Replace Processor Board. 2) Replace I/O Board. e. Check ERR0 and ERR1 LEDs. 1) If ERR0 on and ERR1 off, F16 bus error: a) Replace I/O Board. b) Replace Processor Board. 2) If ERR0 off and ERR1 on, memory bus error, strip to single bank, and retest. If still on: a) Replace single bank of DIMMs. b) Replace Memory Board. c) Replace Processor Board. 3) If ERR0 on and ERR1 on, processor bus error, strip to single processor in slot 1 and processor/terminator to slot 4. If still on: Netfinity 7000-M10 - Type 8680 205