Methods For Testing L3 Cache Modules For A Short Circuit - IBM pSeries 670 Service Manual

9. Replace the primary I/O book.
10. Replace the fan chassis. See "Fan Chassis" on page 849.
11. Turn on power as described in "Powering the System On" on page 780.
12. If an MCM or L3 cache module was just added or replaced, go to the service processor menu and
select System Information Menu, then select MCM/L3 Interposer Plug Count Menu.
If the MCM/L3 Interposer Plug Count Menu is not available, the system firmware level is too old, and
the MCM plug count must be recorded as described in "Installing the MCM/L3/Passthrough Plug Map"
on page 791 and "Using this Label" on page 791. You can also upgrade the system firmware to the
latest level to make the MCM/L3 Interposer Plug Count Menu available, and then continue with 13.
13. Find the index number that corresponds to the module that was just added or replaced and enter the
new plug count that was included in the FRU or MES kit. If the plug count is not included with the
FRU, enter the number & as the new plug count to account for the number of times the module was
plugged during the manufacturing process. If the MCM/L3 was replaced from field spares, enter the
number 8. Exit the menu completely before powering on the system.

Methods for Testing L3 Cache Modules for a Short Circuit

The following testing methods are available for use depending on your testing hardware and system
requirements. Use the following list to determine which of the testing methods you should use:
Method 1. Multimeter and Original Capacitor Book (part number 11P1540)
Use this testing method if you have a handheld multimeter and the original capacitor book. Use
this method only when Method 2 and Method 3 are unavailable. Refer to "Method 1. Testing L3
Cache Modules for a Short Circuit" on page 825.
Method 2. Multimeter and New Capacitor Book (part number 44P2471)
Use this testing method if you have a handheld multimeter and a new capacitor book, or any
capacitor books with the necessary LGA test support features. Refer to "Method 2. Testing L3
Cache Modules for a Short Circuit" on page 830.
Method 3. New Capacitor Book (part number 44P2471) and LGA Shorts Tester (LGA-ST) (part
number 44P4107)
This method is required for systems with a 1.5 GHz MCM or higher systems. To perform this
procedure, you must have a new capacitor book, (or any capacitor books with the necessary LGA
test support features), and the new LGA-ST. Refer to "Method 3. Testing L3 Cache Modules for a
Short Circuit" on page 835.
824 Eserver pSeries 670 Service Guide