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2-4 Removal and Replacement HP OmniBook 4100/4150
Removing a RAM Board
(User-Replaceable)
The OmniBook 4100 has 32 MB of RAM on the motherboard and has one RAM slot for installing
additional RAM. The OmniBook 4150 Series has no RAM on the motherboard and has two RAM
slots for installing RAM.
Table 2-4. RAM Board Replacement Part Numbers
Description Part Number Exchange OmniBook
Part Number 4150B 4150† 4100
RAM board, 32-MB SDRAM (66 MHz) 1818-7413 F1456-69001
••
RAM board, 64-MB SDRAM (66 MHz) 1818-7414 F1457-69001
••
RAM board, 128-MB SDRAM (66 MHz) 1818-7549 F1622-69001
••
RAM board, 32-MB SDRAM (100 MHz) 1818-7950
•••
RAM board, 64-MB SDRAM (100 MHz) 1818-7951
•••
RAM board, 128-MB SDRAM (100 MHz) 1818-7952
•••
† Models called 4150† in this manual have no marking in the serial number, whereas models called
4150B have 4150 B after the serial number.
Caution
Handle the RAM board only by its edges and provide proper grounding. Otherwise, you may
damage the board due to electrostatic discharge.
Required Equipment
• Small Phillips screwdriver.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery.
2. Turn the unit bottom side up, then remove the two screws from the RAM/BIOS cover and remove
the cover.
3. Release the two latches at the sides of the RAM board, so the free edge of the board pops up.
4. Pull the board out of the connector.
Figure 2-2. Removing a RAM Board
Note:
OmniBook 4100 shown. For the
OmniBook 4150 Series, there are
two RAM slots (with no RAM built
into the motherboard).