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 Post subject: WD80EFAX wont spin up
PostPosted: June 5th, 2019, 7:32 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
Hi there,

my trainee made a big misstake. He connected a 19V powersupply to a NAS with 12V input. The result of it was, that the NAS wont turn on and both of the HDDs wont spin up.
If I connect now the HDD with a S-ATA powerconnector in the PC it also wont spinup. Also I cant see the disk in the BIOS. If i connect a external S-ATA powersupply to the disk the LED on the powersupply wont go off and no spin of the disk-> so I think the both diodes behind the connector are OK.
Cant see burned parts on the PCB or the disk.

Anyone an idea how to meassure the PCB?

best regards
Fabian


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 Post subject: Re: WD80EFAX wont spin up
PostPosted: June 5th, 2019, 9:15 
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Joined: September 8th, 2009, 18:21
Posts: 11717
Location: Australia
Measure the 12V TVS diode and its associated fuse.


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 Post subject: Re: WD80EFAX wont spin up
PostPosted: June 5th, 2019, 9:31 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
Thank u fzabkar,

left fuse and 12V TVS Diode was burned.

Fabian


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