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So I finally dug this board back out of the pile of work this evening and now when I connect the MagSafe theres a Greenlight and some times it experiences Quarter Fan spin, sometimes it lights up green light but doesn't do anything fan wise, other times it gets a green light fan runs and the CPU...

Don't want to sound stupid jumping in here, I have the same problem same board and I've been following this along and I too replaced the ISL good soldering without replacing the FETs and wanted to be sure that in general replace the ISL along with the Inrush Limiter and the Reverse-Current...

G.Beard dukefawks I've actually been watching your headaches from the sidelines on the forum and was under the impression that the GPU hunt was always this difficult! Is this just a recent situation since there seems to be a swell in the market of A1286 and A1297 boards that their GPUs are...

We are looking at an ATCO AT-707 Benchtop model, and I started watching your video with Louis about the Fake Overseas GPUs, as well as read through the misery of L2 Computer of which we can already relate to!

We are a newer 2 man shop and we are finding ourselves in need of BGA ship replacement more and more often, whether its an SMC or GPU. We are getting a good deal on a used BGA rework station, and are looking to compile a list of stencils to hunt down and buy, for SMCs, AMD GPUs, MUX chips. Has...

No corrosion around CPU, after leaving the board overnight when I first connected it to power all I got was quarter fan spin. I replaced the ISL chip and the quarter fan spin continued. Pulled the RAM and the fans ran at full speed for about a minute then cut off. Any ideas never seen this before!

Got in an A1286 820-2915 board that had a liquid spill that soaked into the optical drive area, went through the cleaning regiment and the board powers on green light, fans spin, no chimes, ram error beeps, or other signs of posting like USB mouse lighting up. All S0 powers rails are present...

I replaced all of the current sensing resistors as they looked nasty and probably burnt, also replace the 6259 and the board powered on green light, fan stayed running however no post beeps with ram removed. The board then cut off and now has no signs of life, no more green light 0V on G3H and...

Sounds good! Just got in the new Amscope so we got back up and running with our board repairs. The resistance between pins 17/18 is 3.1 ohms which is higher than the 2.21 it should be the 0 ohm (R7052) is reading 0.2 ohms and R7051 is reading 2.4 ohms which should be good as well the only one...

Will do! Im out of the shop now but will check those in the morning! If those resistance readings are off replace the resistors of course and also the ISL6259 or is there a way to see if the chip is good on the board?

We got a board into the shop yesterday that had pretty gnarly water damage, full glass spilled on the keyboard. After looking at the board under the microscope and notating which areas and surrounding components were damaged, it went through the Crest. After removing the board and completing the...

*top of the island chip is being shorted to ground

We have found out that the isl chip has 3 pins that is being shorted, could this be caused by shortage in the smc chip?

Just removed the U7000 replaced with a new chip, also removed all surrounding resistors and capacitors and replaced form donor board that had a bad Haswell CPU. Still no 3v42 and only ~0.5 coming in at the DC Jack, 4.1v on 17/18 of U7000, 21.1v pins 27/28 could it be that the SMC got shorted?

we were getting 17/18-24.1v , 27/28-21.3v, which you're probably right about the U7000 being blown.

I have a wine damaged 820-3332 board no major signs of corrosion, when plugged in we get green to orange light when mag safe 2 is plugged in, however would not power on or get a fan spin, measures PBBUS G3H was low voltage between 4.6v and tested found an issue in the isl6259 chip, I ordered a...