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Okay, so I was getting no voltages on any of those paths. Evidently I was misled by Power On Sequence step #12 - PWRBTN. I thought that was the point where you need to press the power button? So, knowing that... I retested a few things. I even retested step #24 PLTRST, which I obviously didn't test correctly before. I found 2.29V. Over on the other thread I mentioned, j64x86 said this should be at least 5V, but I'm not sure where he got that information. How do I find out what voltage it should be?
And if it's actually good to that point, where does that leave us? Before disassembling,...
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Okay, I'm looking at a power flow diagram now. From what I measured before, the power is good up to +VSYS. From there it takes 14 different paths, mostly through resisters then buck converters... I can locate these on the board diagram. Cool.
+VCCIO
+1P2V_DUAL
+1VSB
+1P8VSB
+VCORE
+VCCSA
+5VSB
+3P3VSB
+3P3V_SSD
+VCC_EDP_BKLT_OUT
+VCCGT
(IR Illuminator) D4902
+VCCEDRAM
+VCCEOPIO
Looks like I have some more probing to do. Hook up power adapter and test for voltage on each path?
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Microsoft Surface Pro (5th gen) model 1796 - no power
Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
[URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/102470-need-schematic-for-microsoft-surface-5-pro-1796-calgary[/URL]...
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Hi All,
I grew up with computers, been repairing them since high school and running my own business since 2012.
Every now and then I've done some component-level repair, mostly just replacing bad caps & soldering on new laptop power jacks.
Hoping to improve my board repair skills here with y'all!
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