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iMac wont start up!

By better_be_good ·
Its an early 1998 version, the problem is that when I push the power button the light and tone come on but quickly dies (on for about 2 seconds).
And so wont start up, it sounds like the power supply swiches itself off. I thought it could be a fault on the analogue board causing the power supply to turn off. If anyone has any ideas / suggestions as to what components could have failed etc, it would help a lot. Please let me know if you require further info.
Thanks in advance!

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iMac wont start up!

by WaveStorm In reply to iMac wont start up!

I'm not a certified Mac tech, but I agree with your targeting of the power supply as a likely problem.

If the tone comes on and then you hear nothing else, then it's probably not a serious system board error -- effectively, the iMac does a power-on self test and spits out one of several different tone sequences if it fails POST. In addition, the screen will show a 'sad mac' icon with a pair of error codes underneath.

Given that it won't even get that far, the power supply is a good culprit.

Incidentally, if you're working in a corporate/educational environment, I strongly recommend acquiring the Service Source CD kit. It's a tremendous resource, and the cost is negligible: it more or less contains exactly the same information and resources as Apple's certified techs have at their disposal.

Cheers,

michaelf at wavestormITS com

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iMac wont start up!

by better_be_good In reply to iMac wont start up!

Thanks WaveStorm, it wasnt the Power Supply as we both thought, but the Analogue Board. A component had failed causing a short which then trips the power supply. The power supply itself works fine. Thanks for the info about Service Source CD though,not sure if its available in the UK?? I'll try and track it down!
Thanks again........ case closed.

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iMac wont start up!

by better_be_good In reply to iMac wont start up!

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