Search results

Those are correct readings, I found the pch is getting hot on thermal cam.

Bad PCH on this.

No still the same voltage. Liquid damage was around the smc which I have changed

Yes and pm_Batlow_l is 3.3v as listed above. PM_SLP_SUS_L = .812mv shouldnt this be 3.3v?

I got this board that had small amount of liquid spill. ppbus_g3h was 8.2v after swapping the smc it rose to 8.6v but stays at .05mA. 3V3_SUS = 3.3v PP3V42_G3H = 3.42v RTC_RESET_L = 3.3v PCH_SRTC _RST_L = 3.3v PCH_INTRUDER_L = 3.3v PCH_INTVRMEN = 3.3v PM_BATLOW_L. = 3.3v PM_SLP_SUS_L = .812mv...

Heating Pch section with flux resloved the issue. Many thanks

I have a 820-00165 no sign of spillage on the board. When charger connected it goes to 370ma then to 20ma twice then stays at 20ma U1950 all pins except 8 pulse twice, pin 8 has 3.42v. U7501 pin 23 - 8.58V pin 12 - 3.3v pin 13 - 2.3v ?? should it be 3.3v? no shorts here pin 22 3.3v pin 29 -...

No sign of spillage on the board. I tried pram/Smc reset several times. After running Unigine valley it reboots and screen is garbled see pic. What is the most likely culprit or where to test first?.

Yes all keys work in OS . What controls keyboard? I couldnt see a keyboard controller chip. U4810 voltages are pin 1 = 3.3v pin 2 = pulses around 2.5v pin 3 = 0v pin 5 = 3.3v pin 6 = 0v pin 7 = 3.3v pulsing pin 8 = 3.3v. Is (TPAD_USB_IF_EN_CONN) used in os and Spi used efi boot? Also noticed...

There is no sign of spillage but fan runs fast and some keys on keyboard dont work (Alt) there may be more keys but was trying to boot to external. I have replaced touchpad cable and tested with known good keyboard also. I have tested J4800 in diode mode and all good. I have also tested all...

Yes it has no effect. I have changed U3900 again and it seems to be working now . Just reassembling to fully test.

Yes I have tried working assembly previously. if U3900 is not good would that also cause this?

Board originally was not recognizing webcam , I replaced U3900 as all voltages were present but forgot about clock signal (missing clock signal). Now not getting Keyboard backlight no voltage on enable to U7750 (0v on SMC_SYS_KBDLED), checked trace to smc was good, checked fb resistor and...

C7020/23 are 2.6ohm, C7050 is jumping between .9v and 1.7v. With battery is the same.

I have a liquid damaged board. 5v on usb meter U2800 and U3100 were both bad so replaced them. I now have 20v 35ma. I only have 1v on PPBUS_G3H diode reading .395. R7021/22 were both bad so replaced . Q7030 pin1 = 20v, pin

I have a liquid damaged board stuck at 5v. U3200 whats cycling on usb meter all other were 5v constant. I replaced U3200 and all are stable 5v. I check for shorts/diode reading on all 4 CD3215's all were around the ,400 mark. I checked the ldos from all 4 and all are present except LDO_BMC 1.1v...

Was a bad lcd, many thanks for your input.

Hi thanks for your help but unfortunately its still the same. When charger is plugged in the macbook chimes and backlight comes on. Keyboard caps lock lights up cpu heats and fan spins.

There are no signs of spillage on the board. I have tried reseating the video cable. The board draws 20v at 640ma. I dumped the bios but meinject tool says theres no me region or me region is corrupt. It make a sound when you plug it in and using a Chipmunk it flashes usb activity. Cpu Also gets...

Would there be any point in trying a known working dump of the SoC ROM? If so would anyone have one available?