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I don't have another board to measure against but I plugged in another display assembly I know worked in the past and that didn't work. This time i also saw ESC light appear on the touchbar
I booted in DFU mode. Initially I tried to revive firmware but I never saw anything appear on the screen like I have in the past then it froze so I cancelled it and restored the firmware.
Again I didn't see anything appear on the screen then this image appeared on the screen that said...
I couldnt find the ONOFF lines for this board because the board view I have is on a pdf file.
I checked for voltage on PM_RSMRST_L and PM_PWRBTN_L on R1800 and R1802 and got 0v on both.
That was with the battery in. Wout the battery it goes to 0.05A for a couple seconds then stays at 0A.
I checked for voltages on PP1v2_S3, PP1v8_S5 and PP3v3_S5 and they had 0v.
L7690(PP3v3_G3H) has 3.3v on it and L7030
Okay I injected voltage and found that CB300 was getting really hot. I replaced that and now it turns on the trackpad clicks, I hear the apple sound that happens when you plug your charger in and the caps lock button turns green when pressed. The only thing is nothing appears on the screen...
I have this board that was sent in for water damage. When I plugged it in the trackpad would click and the ammeter read 19.8v and 0.55A
The only components that looked like they had any kind of liquid damage were C8412 , C7660 and Q7660. I replaced C7660 and C8412 and put the board in the...
I have this board that doesn't look to have any liquid damage and is stuck at 5v and 0.21amps on all 4 ports. There isn't any boot loop just a steady 5v. I was getting 1.4v on PP3v3_G3H and so far I have replaced U6903, R6910-13, C6910/11/13/15/16 and D6902 .
I still get the same voltage but I...
Hi, I have this A1706 that has some damage to the corners of the topcase and may need to be replaced. I found some top cases that have only a keyboard so I would need to transfer over the touchbar and everything else.
I was wondering how difficult it is to remove the touchbar from the original...
Hi, I have this A1706 that has some damage to the corners of the topcase and may need to be replaced. I found some top cases that have only a keyboard so I would need to transfer over the touchbar and everything else.
I was wondering how difficult it is to remove the touchbar from the original...
Okay I figured out that C7505 was issue had some solder connecting it to the probe point in front of it. I figured they were connected so I didn't bother separating the solder but it is all fixed now.
Thanks guys!
Sorry I was on my phone and didn't see 2informaticos' post. I did replace the U7501 chip but here are some of the measurements.
Resistance to ground on PP5V_S5 is around 50kohms.
U7501
Pin 12 - 3.45v
Pin 13 - 2.00v
Pin 21 - 3.4v
Pin 22 - 3.3v
Pin 23 - 8.57v
Pin 29 - 1.58v
Sorry I forgot to mention those voltages but I get 8.58v on ppbus and 3.4v on ppvrtc_g3h. I will give you the voltage for smc_pm_g2_en in a couple of hours.
SMC_PM_G2_EN - 3.45v
I have this board that was liquid damaged around by the SMC U6100, and U7501 mostly. I have UC'd the board and replaced U7501 as well as some resistors that were damaged by the SMC.
I am now getting 1.57v on PP5V_S5. I checked for PM_SLP_S4_L and it is showing 0v and not even a pulse when the...