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JTAG is removed. U1900 is replaced. I verified that every pin has continuity to where its supposed to go on this chip and U6100. Macbook worked for about 15 minutes, then shut off. Its currently spinning up the fan, no gong,l no image. fan stays spinning for ~8 seconds, then stops. rinse...

Alright, I've placed U6100 back and it boots up normally again. I've measured all surrounding resistors, they all perfectly match their values as in the schematic. Traces around U6100 look fine. JTAG and U1900 and surroundings also look perfect to me. I'll remove the JTAG and replace U1900 just...

Kapton tape is fine, but I dont want to rely on that keeping a connector in place on a board. aprendiz thanks, thats what I was looking for. Looks like you need to be careful with those pens, datasheet info says, among other things: Highly flammable liquid and vapor. Causes serious eye...

U6100 is a CMOS chip huh.. fuck me, I thought the way those pins are named reminded me of something. Thought it would be a SOIC8 like every windows laptop has. Much shame for me. Will report back later.

U6100 looked fine, but in the middle of measuring its pins, it decided to start kind of working. It would power on, fan would gradually increase speed and eventually power off, and then on again. I replaced U6100. Now, it powers on normally, but it never finishes loading OS X. It gets through a...

The board where I fixed the magsafe light earlier came back no longer starting up. Magsafe light still works. It has booted up once since I got it back, but mostly refuses to. It came in originally with corrosion, which cleaned up good and left the machine functional, but its not so hot now...

As my previous post disappeared, another attempt: I have a board here with a ripped off fan connector that took the pads clean off. I'll have to run lil jumper wires to each pin, which should be doable, but I'd like to secure the connector itself in place. I have regular superglue, but I'm sure...

Someone brought me a macbook where an attempt was made (by himself) to remove the logic board, which resulted in a torn off fan connector. Normally, I would solder on a new (or the same) connector, but this one is a bit of a challenge. Exhibit A: Running some wires to restore the proper...

I ran a jumper, board fixed. :)

This board had water damage. It started working fine after letting it enjoy my UC, but the magsafe light stayed off. Took me some time before I figured out that one of the pins in the LIO connector had corroded itself in half. Its the PP3V42_G3H pin, so that explains the missing light. I've...

Thanks, good stuff!

Thats what I was thinking Smiba. If something goes wrong with a board I replace, I'm going to be the one who has to deal with that. Sending stuff back to China/wherever and then waiting forever.. no thanks.

Thought so. Good enough for me, thanks duke

I've run into a board I probably wont be fixing. Its time to tell my customer that I can't fix this board and offer her a few options. I'm trying to decide whether one of those options should be logic board replacement. I've had my fair share of crap components from China over the years...

You're certainly not alone. Had a customer on the line inquiring about lcd replacement for a macbook air 2012 yesterday.. didnt take me long to find out they're either out of stock or stupidly high priced everywhere. There's a couple of threads on this forum discussing this topic and I think the...

I'll inspect the whole thing and see if I find anything of interest. If nothing, I guess I'll have to give up on this one. Hate that :(

I'm not exactly in the position to be handing out tips, seeing that I've got only a couple of reballs under my belt, but as you've helped me get things a little smoother I'll do my best to be of some help. One thing that was making my reballs after the first one much harder turned out to be crap...

I hadn't replaced U2600 yet, but I have now. Hasn't changed anything. R7402/3 are 150/181kOhm ALL_SYS_PWRGD is pulsing high

I finally got around to replacing the SMC again. When removing the previous one, I noticed that three balls had merged. That may have happened during removal, but I probably bumped the SMC too hard when trying to see if the solder had melted while placing it. The merged balls were: LPC_AD<0>...

I've run ASD EFI and OS several times now (all default tests) and it's passing everything every time. I've booted up OS X and ran furmark (or whatever its called nowadays) for a couple hours without issues. Anything else I ought to do before calling this damn thing fixed?