Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

I have no power
SSD_CLKREQ_L=0
TBT_T_CLKREQ_L=0
but as I understand it there should be 3.3v

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

SSD_CLKREQ_L=3.3V until you connect SSD_PCIE_CLKREQ_LB_L then the voltage drops to 0.090V. but there is no short circuit. resistance SSD_PCIE_CLKREQ_LB_L=3.75 megohm.

[mon2]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

No. If with the _L suffix then if the signal is 0V = logic low then it is active. This is good for these 2 signals.

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

No. If with the _L suffix then if the signal is 0V = logic low then it is active. This is good for these 2 signals.

SSD_CLKREQ_L=0v but it should be 3.3v? maybe the problem is in UB000?

[mon2]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

No, this signal is ok.

Reference:

https://boards.rossmanngroup.com/thr...ing-ssd.39782/

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

how can it be that all the readings are normal but the ssd is not working?

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

No, this signal is ok.

Reference:

https://boards.rossmanngroup.com/thr...ing-ssd.39782/

what else to check?

[mon2]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

PCIE_CLK100M_SSD_LB_P=0V
PCIE_CLK100M_SSD_LB_N=0V


These lines should not be 0V when the ssd is working. This clock is generated by the pch. This clock is required by all pcie devices to function. This is a 100mhz clock.

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

the voltage on these lines exists and fluctuates

PCIE_CLK100M_SSD_LB_P=0.725V
PCIE_CLK100M_SSD_LB_N=0.716V

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

I also noticed that when connecting an external monitor via type-C there is no image (maybe there is a connection).

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

any more advice? recommendations?

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

[mon2]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

Remove all power. Meter in DIODE mode.

Red meter lead, yes RED to ground.

Black meter lead to the point to test.

Measure each signal of the SSD interface in DIODE mode at the lifeboat jumper block area.

Post each measurement.

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

Remove all power. Meter in DIODE mode.

Red meter lead, yes RED to ground.

Black meter lead to the point to test.

Measure each signal of the SSD interface in DIODE mode at the lifeboat jumper block area.

Post each measurement.

OKAY CHEF.
PPVIN_2V7NAND_LB=0.422

PP5V_S4_P2V7NAND_LB=0.396
SSD_BOOT_LB_L=0.394
SSD_PWR_EN_LB_L=0.535
STORAGE_LB_EN=0.515
SSD_RESET_LB_L=0.509
SSD_PCIE_CLKREQ_LB_L=0.510
PCIE_SSD_D2R_LB_P<0>=0.387
PCIE_SSD_D2R_LB_N<0>=0.387
PCIE_SSD_R2D_LB_C_P<0>=0.358
PCIE_SSD_R2D_LB_C_N<0>=0.357
PCIE_CLK100M_SSD_LB_P=0.337
PCIE_CLK100M_SSD_LB_N=0.336
LPSR_EN_LB_L=0.490

PP3V3_S5_SSD_LB=0.351

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

I have TBT_T_CLKREQ_L=0v. and in a working MacBook TBT_T_CLKREQ_L =3.3v.

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

how to check if the ssd is working properly? Maybe they have a problem or in the processor?

[reformatt]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

I already mentioned that the SSD controller has a RAM layer above the processor and these are often underfilled. You didn't mention whether you had reballed that layer or not, and what the source of the replacement was.

As far as the NAND's go, you can use the JC P13 programmer to test.

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

I already mentioned that the SSD controller has a RAM layer above the processor and these are often underfilled. You didn't mention whether you had reballed that layer or not, and what the source of the replacement was.

As far as the NAND's go, you can use the JC P13 programmer to test.

Yes, both layers were soldered 2 times but the result was zero. the second donor controller was also soldered from another board, but the result was also zero. I will look for another donor fee.

[PITERPENY]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

OKAY CHEF.
PPVIN_2V7NAND_LB=0.422

PP5V_S4_P2V7NAND_LB=0.396
SSD_BOOT_LB_L=0.394
SSD_PWR_EN_LB_L=0.535
STORAGE_LB_EN=0.515
SSD_RESET_LB_L=0.509
SSD_PCIE_CLKREQ_LB_L=0.510
PCIE_SSD_D2R_LB_P<0>=0.387
PCIE_SSD_D2R_LB_N<0>=0.387
PCIE_SSD_R2D_LB_C_P<0>=0.358
PCIE_SSD_R2D_LB_C_N<0>=0.357
PCIE_CLK100M_SSD_LB_P=0.337
PCIE_CLK100M_SSD_LB_N=0.336
LPSR_EN_LB_L=0.490

PP3V3_S5_SSD_LB=0.351

What can you say about these indicators?

[Udemzy]

Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

Note that reprogramming the bios can also solve no SSD/hdd issue.