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 Post subject: Sandisk SDSSDP-128G Dead
PostPosted: May 22nd, 2017, 3:54 
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Joined: April 3rd, 2015, 4:26
Posts: 35
Location: Germany
HI,

any ideas how to meassure the fuse?
The Led wont blink and the SSD did not recogniced in BIOS.

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best regards
Fabian


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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 22nd, 2017, 13:52 
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Joined: September 8th, 2009, 18:21
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Location: Australia
Measure the voltages across the capacitors and on either side of "17X".


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17X.jpg
17X.jpg [ 89.62 KiB | Viewed 1508 times ]

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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 23rd, 2017, 4:13 
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Joined: April 3rd, 2015, 4:26
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Location: Germany
HI,

thx for reply.

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Fabian


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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 23rd, 2017, 15:21 
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Vcore = 1.24V
Vio (?) = 3.19V

3.0V and 1.8V appear to be the supplies for the NAND array.

In short, the supply voltages appear to be OK. I would check the 25MHz crystal with a scope, and I would confirm whether any IC is hot to the touch.

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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 23rd, 2017, 16:45 
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The pinout of the NAND chips does not appear to be ONFI TSOP48. That said, the attached test points appear to connect to Ready/Busy* pins (which are open drain), so I'm wondering whether shorting these test pads while powering up the SSD will initiate some kind of test mode. Perhaps the SSD will then show up via SATA, albeit in test mode?


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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 24th, 2017, 2:47 
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If I short the 2 pins an connect the drive to a PC i can see in the Diskmanagement a new disk. It has no partitions. In R-Studio i can see a partition with 15kb. So i think that is the testmode u wrote.
No one of the ICs get hot and I cant see some burned ICs.
The 25 MHz crystal to check is not possible for me. I dont have a scope.


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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 24th, 2017, 3:15 
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ISTM that your SSD has a firmware problem and/or bad NAND. I don't believe there is any DIY solution. :-(

The crystal is OK.

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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 24th, 2017, 3:26 
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Location: Adelaide, Australia
This controller should be ok to do a NAND chip-off recovery.


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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 24th, 2017, 9:14 
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OK,

thanks for ur help.

Fabian


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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 25th, 2017, 13:17 
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Location: CDRLabs @ Chandigarh [ India ]
HaQue wrote:
This controller should be ok to do a NAND chip-off recovery.


Haque Sir :) ,
Which controller is this i could not figure it out .

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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 25th, 2017, 13:52 
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Looks like 20-82-00369-1 to me

Something like this...


http://www.flash-extractor.com/library/ ... 94_93__4x1

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 Post subject: Re: Sandisk SDSSDP-128G Dead
PostPosted: May 26th, 2017, 7:25 
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Joined: August 15th, 2006, 3:01
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Location: CDRLabs @ Chandigarh [ India ]
pcimage wrote:
Looks like 20-82-00369-1 to me

Something like this...


http://www.flash-extractor.com/library/ ... 94_93__4x1


Thanks Sean Sir ,
Softcenter is on my investment list in a near time after i get the hang of VNR a little

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