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Extra info for APPLE SERVICE MANUALS iMAC Slotload CD

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Yes: Test the unit with MacTest Pro and return the computer to the customer. No: Plug in the AC power cord and reset the PMU chip again. Do you have power to the system now? Yes: The battery is likely bad, check the battery. No: Go to the next step. Bad video cable connection. - Verify that the CRT video board cables, the RGB cable, and P701 (the deflection yoke cable on the power/ analog board) are securely attached. If the problem persists go on to the next step. Bent CRT neck pins. - Remove the CRT video board.

1. Disconnect the power cord and check the battery in the battery holder (BT1). 7 volts. If the battery is bad, replace the battery, wait ten seconds, and then reset the PMU (refer to the next step). If the battery is good, go to the next step. 2. Press the PMU reset switch (S1) once on the logic board and then proceed to step 3. Do NOT press the PMU reset switch a second time because it could crash the PMU chip. 3. WAIT ten seconds before connecting the power cord and powering the computer on.

Check that the pins on the CRT neck are not bent. Carefully reseat the CRT video board and power on the computer. Do you have video now? Yes: Run MacTest Pro and return the computer to the customer. No: Go on to the next step. Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears Normal startup boot chime, the LED is on, and the hard drive starts up. The display, however, is solid gray. Possible Cause Possible Fix Bad power/analog/video board - Check for trickle power on the logic board (Refer to “Testing J9 for +5 V Trickle Power on the Logic Board” mentioned earlier in this chapter).

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