ahoonid
CapsLOCK
Last Activity: 06-07-2025, 02:58 AM
Joined: 06-28-2023
Location: Frankfurt
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Noted. Thanks again. So the 2 uF difference is not a problem at all?Leave a comment:
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One last question mon2.
I don't know if it happened by me or by the previous owner while pulling out the back plate, but two caps were knocked off of their pads. Most probably I'm not to blame cuz I usually am very careful with this and there were dents on the edges near the screws so it was definitely forced before.
The caps were C9591 and C9592. One of their legs were still connected and upon checking I noticed one of them was shorted. I fixed the healthy one back in place but I had issues finding the exact replacement for the shorted one.
The caps are both 20 ยตF 20%...Leave a comment:
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Thanks for suggesting the forum. I'll give it a read before buying the infiray for sure ๐.
8Hz!!! DoD is being selfish here ๐...Leave a comment:
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Got it ๐
Yeah expensive af but funny enough I got the laptop for dirt cheap man! I got it off of ebay for like 80โฌ!! 32TB RAM 2TB SSD! Can you believe it
))) I couldn't allow myself for it to stay dead.
Shipping from France to Germany will make any repair economically not viable ๐. I'm studying my master's and only do some repairs as a hobby from time to time. But who knows maybe I'll make a side job out of it some day. For now I'm just happy I'll revive stuff and not let these become land waste.
I'll definitely think about the advanced multimeter. I actually...Leave a comment:
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The MacBook lives to see another day man. Your help and inputs are much much appreciated mon2!!! It was indeed C7081!
I would love to hear and learn how you put your finger on this cap specifically! Why this one and not C7080?? Not a problem if you're not in a mood to further explain. You've helped more than enough so far.
Anyways thanks again and cheers mate.Leave a comment:
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Done. No longer continuous beep. Resistance to ground is OL now! Was that the issue!?Leave a comment:
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That's the exact current situation mon2 ๐Leave a comment:
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Well I pulled one leg on each and every one of these bastards and I still have a short. C7054 was a tiny nightmare that I had to use the heatgun for!
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PPVBAT_G3H_CHGR_REG's resiatnce to ground is still 0.4 ohm.Well I pulled one leg on each and every one of these bastards and...Leave a comment:
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Thanks mon2.
Resistance to ground @ L7030: 35 k ohm
Ok I removed the R7060 current sensor now. PPVBAT_G3H_CHGR_REG's resistance to ground hasn't changed. I have 0.2 to 0.4 ohms again.
Resistance to ground of C7066 is in Mega ohms.
Probably a very stupid question but I need to learn and confirm anyways : D
Before taking out the current sensor, on continuity mode of my multimeter, both C7066-C7069 were beeping non stop. After the sensor is removed, they no longer beep continuously. Does this also confirm the short is no longer from this side? Because on...Leave a comment:
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U7000 hasn't been touched. Yet. I injected 1V 1A to the shorted side but nothing gets hot and 0.93A is drawn. I changed it to 1V and 3A and no change in the current drawn and no heat anywhere to be found. I don't have a thermal camera but used the alcohol test carefully with no luck! Everything is cold!Leave a comment:
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I think my initial assumptions are not correct at all.
I removed the F7000 and F7001 fuses and now the resistance to ground from the PPBUS G3H pad of the fuse is in K ohms and rising. From the other pad of the fuse (PPVBAT_G3H_CHGR_REG) I have 0.2 to 0.4 ohms resistance to ground. Does this mean the short is on this side? Should I inject 1V 1A to this pad?
Could the issue be U7000 (Isl9240)?Leave a comment:
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A1990 820-01326 stuck at 5v and 0.19A
Hi everyone.
I have a MacBook Pro 15" A1990 touchbar with (I believe) a dedicated Vaga GPU. The exact Boardview and schematics doesn't seem to exist but I've been using the one for 820-01814 so far.
The MacBook doesn't turn on, stuck at 5v and drawing only 0.19A.
All 4 USB Cs ports behave exactly the same.
There's no PPBUS G3H available.
The resistance to ground from PPBUS G3H is 0.4 ohm. I have found the same resistance to PPBUS G3H from two coils near cpu/gpu area.
Since the boardview I have is different exactly in this... -
Any ideas mon2?...Leave a comment:
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Of course! : )) I was too tired yesterday and didn't proofread before submitting the reply. Yeah sorry, i meant 2.1A and 1.4A.
Without the trackpad and battery, it's drawing 0.7A. with battery connected and no trackpad, its 2.1A again. In both conditions, the fan is on full blast mode. No chime, no image!...Leave a comment:
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Tried good bios. No change at all.
Another thing I noticed is pressing the power button alone for a few seconds turns the laptop off as when I do this, the amp drops from 2.1V to around 1.4V and the trackpad no longer clicks....Leave a comment:
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The seller said the laptop was working just fine before he decided to sell it. He even had photos of the laptop working since he prepared to sell it in good condition. Don't know how much of that I can believe but as I said the board looked real pristine without any marks of prior repairs.
I have a doner bored. You think I should try the chip from it or reflash the original one with a clean dump?
Cheers....Leave a comment:
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Any ideas mon2? Is the CPU fried?...Leave a comment:
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The closest thing I could find on the internet was [url]https://repair.wiki/w/MacBook_Pro_A1708_Not_turning_on,_pulling_~0.56A_at_20V_repair[/url]
But I don't have a missing PM_EN_P1V8S0. I get 3.33V on PM_EN_P1V8S0.https://The closest thing I could fi... PM_EN_P1V8S0.The closest thing I could find on the internet was [url]https://repair.wiki/w/MacBook_Pro_A1708_Not_turning_on,_pulling_~0.56A_at_20V_repair[/url]
ButLeave a comment:
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[B]ALL_SYS_PWRGD[/B] is 3.24vโ
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I checked all the inductors and wrote my measurments on them.
I see maybe 3 or 4 suspects! But specifically L7900 and L806 seems to be too low. L7030 seems to be a bit too high as well.[B]ALL_SYS_PWRGD[/B] is 3.24vโ
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...Leave a comment:
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