![](/images/backgrounds/160780/bg1f3.png)
Exploded View 5
Identifying 350 MHz Logic Boards There are currently three 350 MHz logic boards in service stock for the slot-loading iMac.
Two of the logic boards are under the same part number, 661-2210 (refer to TIL article
58564 or the Service Parts database for additional information). The new Version 2 logic
board is part number 661-2317.
The Version 2 board and the more recent 661-2210 (without a daughterboard) board look
identical, apart from the revision number on the VLSI chip. The Version 2 board (661-
2317) will have a revision number of -09 or -0A on the VLSI chip (see below).
Important:
The 350 MHz logic boards must be exchanged like-for-like.