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Search: Posts Made By: piernov
Forum: Troubleshooting Laptops, Portable, and Mobile Devices Yesterday, 03:21 AM
Replies: 3
Sticky: NVidia bumpgate
Views: 1,856
Posted By piernov
Re: NVidia bumpgate

Thanks, somehow I had never seen this video. What he's saying and what happened don't really sound exactly the same strangely enough… Not really "admitting" to much.

About ATi/AMD unfortunately...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-15-2021, 10:41 AM
Replies: 3
Views: 108
Posted By piernov
Re: MacBook Pro 15-Inch "Core i7" 2.8 Touch/Mid-2017

https://www.badcaps.net/forum/attachment.php?attachmentid=244645&stc=1&d=1631724081
https://www.badcaps.net/forum/forumdisplay.php?f=40
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-15-2021, 05:58 AM
Replies: 3
Views: 108
Posted By piernov
Forum: BIOS Requests ONLY! 09-15-2021, 04:26 AM
Replies: 21
Views: 979
Posted By piernov
Forum: Schematic Requests ONLY! 09-15-2021, 03:47 AM
Replies: 2
Views: 405
Posted By piernov
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-15-2021, 03:43 AM
Replies: 23
Views: 455
Posted By piernov
Re: Dell Precision 7510 charge battery and left side board problem.

SMBUS clock and data have to be checked with diode mode to ground.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-15-2021, 03:39 AM
Replies: 2
Views: 93
Posted By piernov
Re: Apple 820-01326-05 after water spill not start

https://logi.wiki/index.php/Schematics_and_Boardviews_Availability#Main_Logic_Board
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 09-13-2021, 06:03 AM
Replies: 13
Views: 473
Posted By piernov
Re: Sapphire HD7850 1G artifacts

See demonstration: https://youtu.be/Ty5PkmOK0Qs?t=381
I've done this dozens of times on NVidia bumpgate garbage or ATi/AMD garbage (especially Radeon HD4000-7000 and RS780/RS880 but can also work...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-13-2021, 05:33 AM
Replies: 15
Views: 265
Posted By piernov
Re: Macbook Air A2179 Motherboard Component Identifying

Again, even if the picture is of very low quality, this area is clearly liquid damaged.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-13-2021, 05:28 AM
Replies: 18
Views: 297
Posted By piernov
Re: HP DAY11AMB6E0 REV E no power

Power button must be triggered to get ALW power rails on this board IIRC.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-13-2021, 04:06 AM
Replies: 9
Views: 250
Posted By piernov
Re: Lenovo T440s (NM-A052) dead

10 ohms can be ok on some Haswell-H/M CPUs. For Haswell-U it's more like 50-70 ohms (can be higher).
That's with black probe on ground, red probe on ground causes higher resistance IIRC...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-12-2021, 02:59 PM
Replies: 15
Views: 265
Posted By piernov
Re: Macbook Air A2179 Motherboard Component Identifying

https://repair.wiki/w/Visual_inspection
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-12-2021, 02:54 PM
Replies: 42
Views: 811
Posted By piernov
Re: 820-01598 Intersil 9240 chipped?

Phone and laptop boards are very different. If you work the same way on phone boards than you do on laptop boards with hot air you're gonna float all components right away.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-12-2021, 01:31 PM
Replies: 9
Views: 187
Posted By piernov
Re: MacBook Air 820-3437B ALL_SYS_PWRGD Missing

https://logi.wiki/index.php/User:Piernov#I_am_missing_SLP_S5.23.2FSLP_S4.23_.28PM_SLP_S5_L.2FPM_SLP_S4_L.29.2C_what_do.3F
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-12-2021, 01:23 PM
Replies: 42
Views: 811
Posted By piernov
Re: 820-01598 Intersil 9240 chipped?

820-01598 (Pro 13" 2019 2TBT) schematics and boardview files have been available for a while. Not to be confused with 820-01958 (Air 2020) for which boardview file is not available outside XinZhiZao,...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-12-2021, 01:10 PM
Replies: 15
Views: 265
Posted By piernov
Re: Macbook Air A2179 Motherboard Component Identifying

That area of the board has clearly been heavily liquid damaged. Replacing one cap won't be enough to fix it.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-12-2021, 12:58 PM
Replies: 10
Views: 327
Posted By piernov
Re: Lenovo Yoga 520-14IKB not powering on

Here it's more about filtering the power rail to have a cleaned analog supply for the EC (most likely used by some ADCs for current, voltage or temperature measurements).
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 09-11-2021, 09:09 AM
Replies: 2
Views: 105
Posted By piernov
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-10-2021, 11:11 AM
Replies: 24
Views: 410
Posted By piernov
Re: MacBook Air A1932 2019 No Sleep Mode

820-01521 is the only board found in A1932. Shematics already posted on the forum.
Forum: Schematic Requests ONLY! 09-10-2021, 06:38 AM
Replies: 108
Views: 84,453
Posted By piernov
Re: need board view for Apple A1278

As said many, many, many times, 820-2565 is a DC-in board used on most A1278/A1286/A1297, not a main logic board.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-10-2021, 06:19 AM
Replies: 13
Views: 307
Posted By piernov
Re: 820-00840 no backlight after sleep

U5450 is no stuff on production, BOM option SNS_I_BLC for development only.
Forum: BIOS Requests ONLY! 09-09-2021, 04:00 AM
Replies: 11
Views: 1,234
Posted By piernov
Re: help need dump file a1278 emc 2326

https://support.apple.com/en-us/HT202313
And there are 5 different models of A1278.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-07-2021, 01:32 PM
Replies: 15
Views: 465
Posted By piernov
Forum: Schematic Requests ONLY! 09-06-2021, 06:53 AM
Replies: 16
Views: 1,098
Posted By piernov
Re: Macbook pro M1 A2338 820-02020 schematics boardview

BVRv3 is a custom format for FlexBV. Not supported by OpenBoardView for now (maybe one day…).
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 09-04-2021, 12:11 PM
Replies: 4
Views: 176
Posted By piernov
Re: HP g6-2238SL WiFi issue

Usually incompatibility between WiFi card and BIOS or Windows (Windows 10 may especially cause issues).
As a workaround you can tape the rfkill pin of the WiFi card miniPCIe connector.

I would...
Showing results 1 to 25 of 500

 
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