820-3437 no video (vcore present)

ytesfay80

Member
Okay I ordered a TL866 with all adapters and kit for $95 hopefully it'll arrive early next week. Just to be sure though does that mean that the SMC is likely not the issue here since the fan only spun for 1 second once the U6100 chip was replaced.

Also, can I use that TL866 to fix EFI/Bios locked machines? Do you get a lot of machines that need that service?
 

dukefawks

Administrator
No idea if the SMC is good.

Yes you can unlock STOLEN MacBooks with your TL866. No I don't get a lot of them, I live in an area where I do not need to lock my house or car.
 

ytesfay80

Member
Okay something weird happened.
I removed the U6100 chip from my board that I took from a donor, then I gave the SMC some flux and heated it. I then put back the original U6100 and I plugged in the charger soon afterwards.
The fan this time did the 3 times on and off. I didn't take any measurements and just pulled the charger out. I came back 20 minutes later and plugged the charger in and it went back doing the non stop fan spin.
 
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ytesfay80

Member
I've watched louis' videos on smc reballing but I've never done it before so I will practice on my donors. Do you have any tricks on how to make sure it the smc is lined up correctly over each pad since there are no markers on the board?
 

ytesfay80

Member
I've been practicing on a SMC from a scrap board but everytime I try to pull the stencil from the SMC after getting the solder paste melted they never come off cleanly(I've tried 3 times now). I watched Louis' video and he said to heat it slightly then try to pull it off but that hasn't worked for me. Maybe this just takes a few more attempts to get used to this.

Also, my stencil says 980YFC 0.3mm. Is 0.3mm the correct size because I thought I read somewhere that the size of the balls are 0.25mm.
 

dukefawks

Administrator
Go with the larger ones they are much easier. Even 0.35 you can use. It is normal if a few balls come off and need to be manually replaced. You are heating with the stencil in place?
 
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