Hello, good morning. I have some updates. I received the MAX and installed it, and I recovered the 3.3v. However, during the process, the latch of the display connector came loose, so I ordered some connectors and replaced it. While doing this, since the NAND is right on the other side, I lost a 0201 capacitor, which means it’s still not booting. The error code is: = No eMMC block 0 read (eMMC init failure?) I don’t know if this is due to the missing capacitor or if the NAND chip might be damaged. The small capacitor is the 0201 one, shown in this image.
Should the Switch be able to start without this capacitor? What value does it have? Can I get it from a donor board? Thank you very much!
Sorry is this circled in blue
Yeah afair it’s just a bypass cap, so should still boot regardless (though you want to replace it for stability later)
Best guess is if the cap desoldered then most likely cause for your current issue is the EMMC desoldered too and you’ve either got an open or a ball smear issue here. I’d probably reball straight off the bat if it were me (you’ll need stencil and paste or more ideally 90x90 stencil, jig and preformed balls). I guess you could try reflowing but if the balls have smeared below you could potentially make the issue worse following power on and you only really have one chance with the EMMC data and the console basically being a brick (without a backup or flawed workarounds)
Hello! How are you? Thanks for replying! I have a stencil for reballing, solder paste, and I also have a couple of replacement eMMC chips. I managed to make a backup of the NAND. I think I’ll just put in a new eMMC, and I would like to know if I can use a capacitor from the old Switch to replace the one that was lost. I don’t want to open it again for a long time. 
Best regards!
hey
good stuff 
Sure, I don’t know the value off the top of my head, but it should be petty clear which cap is which when looking at your other donors 
I think I’ll put a 100nF one, which I have here; it’s better than not putting anything at all, I believe. The donor boards I have are Switch V2 (not OLED), so I can’t measure the value. 
Thank you! I’ll share the results, let’s see if I can get it working!
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I’ve replaced the eMMC, but when entering Hekate it says: eMMC is initialized in slower mode. 0 MB/s Init Error: 3
Could it be because of that capacitor? I removed the eMMC, reballed it, installed another one, and I’m still getting the same error…
I suspect it was a bad connection on the 4.700k resistor at the CMD point. I resoldered it and changed the flex, and I no longer get that error. Right now I’m restoring the NAND backup, and in eMMC info it shows 400 MB/s, so I think it’s correct…
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Good morning.
After restoring the NAND backup and running some tests, it seems that everything is working correctly.
I wanted to thank @jkyoho and @Severence for your help; without you, I wouldn’t have been able to solve it. I’ve learned a lot from you.
I hope I won’t have to open it again for a long time; it has been a lesson in patience and perseverance.
We can mark the topic as resolved.
Best regards, and see you in other forum threads!
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