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Hi, ive got an 820-00281 that does not boot (no image, no chime, no usb activity, no caps light) but it has fan spin and CPU gets warm. If i let it cool down for a couple of days it turns on and works normal for a couple of minutes and then shuts down to after mentioned conditions. Tried a...

i get 0.004 on good board and 0.006 on bad board

L7370 voltage 0.6v Tried clean ME Bios, no change.

Hi, got an 820-00840 board with no signs of damage. The fan spins but no boot. CPU gets warm but PPVCCCPU_S0G is 0v. Resistance to ground on PPVCCCPU_S0G is 10 ohms

I reflowed the CPU in case of bad solder. It did the trick. Thanks

Hi, got an 820-2838 with no keyboard and no trackpad. Tried known working trackpad, TP Flex cable, and keyboard. I get PP3V3_TPAD_CONN, PP5V_TPAD_FILT, SMC_LID and PP3V42_G3H USB_TPAD_CONN_P USB_TPAD_CONN_N diode mode is the same as good board.

i put 100k and a 60k resistors. Now machine works great. Thanks

Injected 4v but nothings getting hot on the board. I noticed that if i heat the U7090 area, then the machine turns on for a while until it cools down and PP3V42_G3H goes back to 2.8v. I replaced U7090, C7098, C7099, C7090, C7091, and C7080 just in case, but no change.

R7095 and R7096 are good. Resistance to ground on PP3V42_G3H is 10ohms

Hi, got a 820-00165 with no green light. No signs of liquid damage. PP3V42_G3H is 2.8v PPBUS_G3H is 8.1v PPDCIN_G3H is 16.5v measured on pin 1 of J7000 Tried known working DC In bord no change. Tried 85w OEM apple charger, no change. Replaced Q7180, no change.

DFR_1V8_TOUCH_CLK32K_RESET_L stays at 0.9 for about 5 secs then goes off. DFR_1V8_TOUCH_RESET_L shows up at 1.8v for a sec then goes off. DFR_1V8_DISP_RESET_L stays at 1.8v I get the exact same behavior on the good board.

Im comparing values with this page: https://openboarddata.org/?a=showboardsolutions&bpath=laptops/apple/820-02020 and they get similar values for DFR_1V8_TOUCH_INT_L and DFR_1V8_DISP_TE, so i dont get why im getting them lower on the good board. Im still getting 1.8v on DFR_1V8_TOUCH_INT and...

I had a typo in SPI_1V8_DFR_CLK value on good board. DFR_1V8_TOUCH_INT_L and DFR_1V8_DISP_TE still .720

JT700 Bad Board Good Board 1 1 TP_DFR_TOUCH_PANEL_DETECT: .0l .0l 2 2 DFR_LID_OPEN_L: .0l .0l 3 3 DFR_DISP_VSYNC: .0l .0l 4 4 TP_DFR_TOUCH_RSVD: .0l .0l 7 7 SPI_1V8_DFR_MISO: .455 .482 8 8 SPI_1V8_DFR_CS_L: .386 .395 9 9 SPI_1V8_DFR_CLK: .405 .399 10 10 SPI_1V8_DFR_MOSI: .404...

i get 1.8v on DFR_LID_OPEN_L

I did a restore

Yes. Tried good touchbar. ALS works

Also tried DFU

Hi, got a 820-02020 board with no touchbar (no light no touch). Tried known working palmrest, no change. Updated to Sonoma from Ventura, no change. If i change touchbar configuration in OS then the touchbar lights up, but touch still doesnt work. Measured diode mode on both JT710 and JT700...

TDM_1V8_SPKRAMP_L_FSYNC and TDM_1V8_SPKRAMP_L_R2D_R were testing low so i replaced UR900, after replacing they tested good but still no change in sound. Diode mode readings on UR930/40 area test the same as good board. Series resistors test good including RR600.