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| Sandisk sd8sn8u M2 http://forum.hddguru.com/viewtopic.php?f=10&t=40315 |
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| Author: | samstown [ August 20th, 2020, 11:58 ] | ||
| Post subject: | Sandisk sd8sn8u M2 | ||
Hi guys, Any experience with Sandisk SD8SN8U-256-1006 ? This SSD was in HP Laptop, laptop stop booting, drive not recognized without reason, no water, no drop. Those aren't supported by ACE I can imagine debug is what I circle in RED. I've tried to mount with external case, not recognized at all. Thanks Sam
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| Author: | arvika [ August 20th, 2020, 15:04 ] |
| Post subject: | Re: Sandisk sd8sn8u M2 |
Yesterday i do this model with success. There was some problem with contact on some elements. Try LITTLE heat or frozen. |
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| Author: | fzabkar [ August 20th, 2020, 15:25 ] |
| Post subject: | Re: Sandisk sd8sn8u M2 |
If you can provide a better photo, I can show you the voltage test points. IIRC there is a high-side MOSFET load switch which supplies power to the PCB via the DEV SLEEP pin. This is a common problem, at least on other SanDisk/Apple SSDs. |
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| Author: | samstown [ August 21st, 2020, 3:38 ] | ||
| Post subject: | Re: Sandisk sd8sn8u M2 | ||
Thank you guys. I've attached a better pics, hope it's good enough.
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| Author: | jerovsek [ August 21st, 2020, 3:57 ] |
| Post subject: | Re: Sandisk sd8sn8u M2 |
I have same problem on Asus Zenbook. I connect drive to my pc3000 and drive was fully identified under DE. After two weeks I was able to get data back, not 100%, but customer was satisfied with results. From my observations, there is some problem in FW. |
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| Author: | fzabkar [ August 21st, 2020, 15:50 ] | ||
| Post subject: | Re: Sandisk sd8sn8u M2 | ||
Hopefully I have identified the correct pin on each capacitor. If not, then measure the voltage at the other pin, or the voltage across the capacitor, or at the inductor. PMPB20XPE, NXP, -20V, -10.3A, P-channel Trench MOSFET, marking 1D, DFN2020MD-6 (SOT1220): https://assets.nexperia.com/documents/data-sheet/PMPB20XPE.pdf http://chip.tomsk.ru/chip/chipfile18-x.nsf/all/C3479264BEB2373C46257DC1001E5E49/$File/PMPB20XPE.pdf
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| Author: | samstown [ August 24th, 2020, 9:33 ] | ||
| Post subject: | Re: Sandisk sd8sn8u M2 | ||
fzabkar wrote: Hopefully I have identified the correct pin on each capacitor. If not, then measure the voltage at the other pin, or the voltage across the capacitor, or at the inductor. PMPB20XPE, NXP, -20V, -10.3A, P-channel Trench MOSFET, marking 1D, DFN2020MD-6 (SOT1220): https://assets.nexperia.com/documents/data-sheet/PMPB20XPE.pdf http://chip.tomsk.ru/chip/chipfile18-x.nsf/all/C3479264BEB2373C46257DC1001E5E49/$File/PMPB20XPE.pdf Thank you, that's really helpfull. I got power accross capacitor v1 =1.356 v2 =1.052 v3 =2.707 v4 =1.805 Vout=3.257 That doesn't look bad. I measure 0.0 on the brown inductor, I've put a red cross where I measure it. I don't know how to measure the black inductor. Thanks Sam
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| Author: | fzabkar [ August 24th, 2020, 20:38 ] |
| Post subject: | Re: Sandisk sd8sn8u M2 |
Those voltages seem reasonable, although you would need to compare them with a working SSD to be sure. |
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| Author: | samstown [ August 26th, 2020, 3:14 ] | ||
| Post subject: | Re: Sandisk sd8sn8u M2 | ||
Thank you all. Using freeze spray and heat gun, I get ID now but I wonder if it's worth, Map is 98% yellow others are red and it's going to take forever.
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| Author: | samstown [ August 26th, 2020, 5:59 ] | ||
| Post subject: | Re: Sandisk sd8sn8u M2 | ||
I've changed settings following advice I received.
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| Author: | jerovsek [ August 26th, 2020, 6:24 ] |
| Post subject: | Re: Sandisk sd8sn8u M2 |
put also 3000 to UDMA settings instead 500 |
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