Hi everyone.
Macbook Air A1466 EMC 3178 (board 820-00165 A) not turning on and no charging light. Completely dead. With no battery connected it would power up and I could hear the chime, but nothing on the screen and then a sudden turn off. Sometimes during the chime. Opened it up and found some liquid damage. The flat that connects both boards has damage in one side (with a missing pin already). The connectors on the boards are fine, though.
Also, there was liquid damage on the included picture area, which are R8111 and C8111. A quick and soft brush on it made the resistor be gone....
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I can't believe it.
The Macbook came with an original USB-C charger, which was showing 5V when connected to my meter. So I used another original Apple charger I have. Same story.
Earlier today I found a Anker USB-C charger I have and I thought "why not?". I plugged in and... 5V... boom! 20V! And the board started.
Which means both original chargers are not ok. And I wasted my time and yours.
I'm really sorry about that.
The laptop was freezing and rebooting, but it was because of a swollen battery. I disconnected it and it's working fine for hours. Now I...
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All of these are missing.
PPVCC_S0_CPU
PPVCCSA_S0_CPU
PPVCCGT_S0_CPU
PPVCCIO_S0_CPU
PPVCCEDRAM_S0_CPU
PP0V6_S0_DDRVTT
PP0V6_S3_MEM_VREFDQ_A
PP0V6_S3_MEM_VREFCA_A
PP0V6_S3_MEM_VREFDQ_B
PP0V6_S3_MEM_VREFCA_A
PP1V8_S4
PP1V8_S3
PP1V8_S3_MEM
PP1V8_S0
PP1V0_S3
PP1V0_S0SW
PP5V_S4
PP5V_S4SW
PP5V_S4SW_ISNS
PP5V_S0
PP5V_S0_KBD
PP3V3_S4
PP3V3_TBT_X_S0
PP3V3_TBT_T_S0
PP3V3_S4_BT
PP3V3_S4_TPAD
...
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Going ahead of myself cause... why not? I measured all pgood lines.
CPUVR_PGOOD - 0V
P1V0PCH_PGOOD - 3.3V
P1V8SUS_PGOOD - no test point
P1VSUS_PGOOD - 3.3V
P2V7NAND_PGOOD - 0V
P2V7NAND_PGOOD_R - 0V
P3V3SUS_PGOOD - no test point
P5VS4_PGOOD - 3.3V
P5VUSBC_X_PGOOD - 1.2V
PICCOLO_PGOOD - 0V
PVCCIO_PGOOD - no test point​
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The only really low resistances found are on the top coils, with 3V, 3V, 3V, 6V, 6V and 9V. But they are all CPU.
The others are:
P1VS4 - 79 ohms
P1V0PCH - 53 ohms
P1V2 - 237 ohms
PVCCIO - 49 ohms
P2V7NAND - 12K ohms
P5VUSBC - 9K ohms
PP5V - 41K ohms
PP3V3 - 34K ohms
TBA - 2,1M ohms
PPVIN - 1,08 ohms
P5VUSBC - 8K ohms
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PP3V3_UPC_XB_LDO is 3.3V on all CD3215s.
PP3V3_UPC_TA_LDO also 3.3V.
Yes, both SMBUS lines at 3.4V.
I do have a programmer. Not sure if I have any compatible board to solder those componentes on and read it.
I'll check it later. And check the resistances.
Need to do some stuff outside home. Will be back later.
Thanx a lot....
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Yep. I had to rotate the charger connector to get some readings.
As for LDOs... you mean PP1V1_UPC_XB_LDO_BMC? I do have 1.1V on it, on 4 measurements (each CD3215).
By SPI flash you mean the MXIC EFI chip? All seems fine. Receiving 3.3V. CD3215 firmware would be the TB ROM chip? Visually fine, too. And getting 3.3V.
Sorry if I missunderstood something....
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Yes, I do have the LDO voltages. They are all equal the ones from that table.
Voltage on L6900 is 3.4V.
The link you sent seems to be all around PP3V3_G3H, which I do have. I can't see any corroded componentes, from the ones mentioned in there. The board is really clean.
Checked CC1 and CC2 again. I do have 0.8V on it. Small components. Has a bad measure before....
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MacBook Pro A1706 - Stuck at 5V and 0.09A
Hi everyone.
MacBook Pro, model A1706, EMC 3071. Charger shows only 5V and only 0.09A drawn. Board is 820-0239-A. Mint condition. Pretty sure no one ever opened it and was not used much.
I tested all steps from the table here [url]https://logi.wiki/index.php/CD3215_Bootup_Sequence[/url] changing the CD3215 lines as I moved from one USB-C to the other.
What I found was:
- on step 3, I have the voltages as 10V and 7.8V, indicated as "Air" on this table, which I suppose would be for a MacBook Air. But this one is a Pro. Same on all DC3215s.
- on step 11, on...
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Asus XG32V monitor with lines
Hello.
I have here a Asus 32' curved display showing these lines.
A short clip of what shows when I turn it on.
[url]https://imgur.com/a/Z8fyqym[/url]
Here are some pictures of the boards. Visualy they seem fine.
There are lots of videos on Youtube on possible solutions, but I could not find a similar problem with a similar board layout.
Any help is appreciated.
Thanx.https://Hello.<br /> I have here a A...e lines.<br />...Last edited by BMCappelletti; 10-08-2023, 07:35 PM.
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