HP ap5000 All-in-One Point of Sale System User Manual download pdf (Page 66)

In addition, the computer supports:

●

512Mbit and 1Gbit non-ECC memory technologies

●

single-sided and double-sided DIMMs

●

DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not

supported

NOTE: The system will not start if you install unsupported DIMMs.

Installing DIMMs

CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power

to drain before adding or removing memory modules. Regardless of the power-on state, voltage is

always supplied to the memory modules as long as the computer is plugged into an active AC outlet.

Adding or removing memory modules while voltage is present may cause irreparable damage to the

memory modules or system board.

The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is

important to use memory modules with gold-plated metal contacts to prevent corrosion and/or

oxidation resulting from having incompatible metals in contact with each other.

Static electricity can damage the electronic components of the computer or optional cards. Before

beginning these procedures, ensure that you are discharged of static electricity by briefly touching a

grounded metal object. For more information, refer to

Electrostatic Discharge Information on page 35.

When handling a memory module, be careful not to touch any of the contacts. Doing so may damage

the module.

The memory modules are located on the system board behind the touch screen. You must remove

the drive cover, remove the MSR, and disassemble the touch screen display head to access the

memory.

1. Turn off the computer properly through the operating system, then turn off any external devices.

2. Disconnect the power cord from the power outlet.

CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the

power to drain before adding or removing memory modules. Regardless of the power-on state,

voltage is always supplied to the memory modules as long as the computer is plugged into an

active AC outlet. Adding or removing memory modules while voltage is present may cause

irreparable damage to the memory modules or system board.

3. Unplug all peripherals from the side I/O panel.

4. Remove the drive cover (see

Removing the Drive Cover on page 43).

5. Remove the bottom I/O cover (see

Removing the Bottom I/O Cover on page 42).

6. Unplug the power cord and all peripherals from the bottom I/O panel.

7. Remove the MSR (see

Removing the Magnetic Strip Reader (MSR) on page 56).

8. Tilt the touch screen all the way back to its horizontal position and lay the unit face down on a

soft, clean, dry cloth to avoid scratching the touch screen.

58 Chapter 7 Removal and Replacement Procedures

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HP ap5000 All-in-One Point of Sale System User Manual Page 66

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