Troubleshooting

 

Symptom Charts/Startup - 4

 

 

 

Symptom Charts

 

 

 

 

 

 

 

Startup

RAM failure occurs

1

Attach power adapter.

(eight-tone error

2

Check RAM expansion card connection.

chord sequence

3

Replace RAM expansion card

sounds after startup

4

Replace logic board.

chord)

Note: When replacing the logic board, check that the serial port

 

 

 

EMI clip is attached to the bottom of the CPU stiffener. If it is

 

 

 

missing, replace the stiffener. On international units, also

 

 

 

replace the stiffener if the modem EMI clip is missing. The “CPU

 

 

 

Stiffener” topic in Take Apart helps you locate and identify the

 

 

 

two EMI clips.

Note: Perform the battery contact alignment procedure when you replace a logic board. (See Additional Procedures “Align Battery Contacts.”)

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Apple 2300C manual Symptom Charts, Startup

2300C specifications

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