No Video No Boot Chime White LED ON Symptom
The iMac (Early 2006) will turn on (indicated by the front LED ON), but there is NO boot chime and No Video on the display. The faint sound of the fans, hard drive, and optical drive may also be heard.
1. Reset the SMC (Formerly SMU).
- Turn off the computer by choosing Shut Down from the Apple menu, or by holding the power button until the computer turns off.
- Unplug all cables from the computer, including the power cord.
- Wait 15 seconds.
- Plug in the power cord while simultaneously pressing and holding the power button on the back of the computer.
- Let go of the power button.
- Press the power button once more to start up your iMac.
Does the computer display video after successfully resetting the SMC?
Yes: Problem solved.
No: Continue to next step.
2. Verify that only supported SDRAM memory has been installed and that it has been installed correctly. Unsupported and/or defective memory can prevent the iMac (Early 2006) from booting. It may be necessary to install known good memory for testing purposes and replace any unsupported or defective SO-DIMM's identified during this process.
Does the computer display video after verifying and/or replacing the memory with known good memory?
Yes: Problem solved. Verify full system functionality before return the system to the customer. No: Replace the logic board.
Average user rating: 5 stars out of 1 votes
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