Troubleshooting | Symptom Charts/Miscellaneous - 25 |
Identifying Logic Boards
As a general rule, if the Power Macintosh 7200/90 computer has a serial number of xx545xxxxxx or higher, then the computer should have the revised logic board already installed. If the computer has a serial number of xx544xxxxxx, xx543xxxxxx or below, verify that the board is revised as follows:
Look at location G1; G1 is located next to the internal
• If a 20 MHz oscillator is present at location G1, the logic board has been revised.
• If a 20 MHz oscillator is not present (four blank solder pads) then the board has not been revised and should be replaced under warranty.
