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This Power Mac G4 has Mirrored Drive Doors.

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Hard-drive not spinning up at ATA100. Need new LogicBoard?

Hello everyone,

I've got a MDD (DP 867 / 133MHz FSB) with a harddisk not spinning up when connected to the ATA-100 port. At the ATA-66 it spins up , but no target disk function / no boot up. When placed into an external hard-drive bay it works fine.

LogicBoard issue ?

If so ..

May it be possible to fit a FW800 LogicBoard (1474a) into a MDD with an installed LogicBoard "820 - 1380-A" ? Cutting out that port being compulsory . Are there compatible LogicBoards to fit in (eg. 820-1453a)?

Regards Jan.

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Supplemental.

The system does seem to not respond to ANY inputs from keyboard, caps lock not working, fans speed up, heat-sink get warm after some time.

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All the mentioned steps would be helpful if only ribbon cable / harddrive or PMU error where present. This is obviously not the case here.

Closed.

Thanks for you contributions, much appreciated .

Jan.

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Try double checking and exchanging the HD ribbon cables.

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Good to see you back. +

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Thanks for your reply !

No change at all .. tried all ATA ports - disk spins up on the 33 and 66 ATA channel, and remains silent on the ATA 100. It even starts when cable is unplugged while the computer is running.

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Will it start up from the optical drive? Insert disk & hold down "C" key. I have two of the dual 1.42. logic board 630-4643

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I found some good prices here: http://macbookfreak.com/mdd-motherboard-...

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I thought about this one >> http://cgi.ebay.com/ws/eBayISAPI.dll?Vie... <<

are all the boards (FW400) compatible to the 820-1308a? Do you've got a spare board for me?

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Jan Bernert crwdns2934231:0crwdne2934231:0
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