IBM Aptiva 2158 Hardware Maintenance Service page 128

Installing a Celeron CPU
NOTE: Observe the ESD precautions when installing or removing a system
component.
The system board supports a Celeron processor that comes in the SEPP
(Single-Edge Processor Package) type packaging. The SEPP is similar to
SECC and is compatible with Slot 1 connectors.
NOTE: Before you proceed, make sure that there is no processor installed in
the CPU connector.
Follow these steps to install a Celeron processor:
1. Install the universal retention mechanism.
2. Remove the Celeron processor from its protective packaging.
3. Position the heatsink fastener underneath the processor card.
4. Remove the thermal tape protector at the back of the heatsink.
5. Align the four tabs of the fastener with the four holes on the Celeron
processor.
6. Press the heatsink, processor card and fastener together to lock the
heatsink.
96