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

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Power Mac G4 MDD

This Power Mac G4 has Mirrored Drive Doors.

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Jan Bernert @janbernert

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投稿日: 2010年8月3日

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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.

Jan Bernert さんによる2010年8月4日

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

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Thanks for you contributions, much appreciated .

Jan.

Jan Bernert さんによる2010年8月5日

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mayer @mayer

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投稿日: 2010年8月3日

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Try double checking and exchanging the HD ribbon cables.

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rj713 さんによる2010年8月3日

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.

Jan Bernert さんによる2010年8月3日

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

mayer さんによる2010年8月3日

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

mayer さんによる2010年8月3日

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?

Jan Bernert さんによる2010年8月4日

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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. — Jan Bernert
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. — Jan Bernert
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. — Jan Bernert
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 — mayer
I found some good prices here: http://macbookfreak.com/mdd-motherboard-... — mayer
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? — Jan Bernert

Power Mac G4 MDD

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

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