Apple M4753 manual Logic Board Identification

Basics	Repair Issues - 19
	Note: ID codes are in the last five digits of the serial number
	on the component or part. To see the I/O logic board serial
	number, turn the top of the unit toward you, push in on the
	PC Card door, and look down at the bottom case.

I/O Logic Board Identification

There are two I/O logic boards with both TV out and 4 MB of

SGRAM. Look for these differences to differentiate them:

• 661-2019 has components at locations U8 and U9 on the top of the board under the microprocessor board, and an ATI Rage LT chip on the bottom of the board.

• 661-2087 has no components at locations U8 and U9 on the top of the board under the microprocessor board, and has an ATI Rage Pro chip on the bottom of the board.