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so, its impossible to charge up a battery with DC Powersupply, or I have to find SYS_DETECT_L and then the battery would alow charing on a DC Powersupply?

Now days battery have many sensor lines and + and -. I have a battery at 0.1v when I plug in it the DC powersupply at its requested voltage. The battery won't draw any Amps and stays at 0 Amp consumption. How do I make the battery hungry to be charged by a DC powersupply?

Short still there. I have to replace U7100. Report back to you when done.

Dear Administrator, I have a board with minor liquid damange. PPBUS_3GH is present. F7140 = 8.6 U5110 Pin 1 = 3.42 Pin 2 = 0 Pin 3 = 3.42 Pin 4 = 2.8 Pin 5 = 3.3 Pin 6 = 3.4 Pin 7 = 3.42 Pin 8 = 3.3 Liquid damange I made some foto's looks like DDR Power supply chip is damange. But I dont...

thanks for your answer. TO/FROM BATTERY it says. So how this Diode also charge the battery? Looks like one-way only right?

It should protect the board from getting to many current in? Lets say when a wrong battery is attached? I don't get how the same Q7155 works both ways, for charging and for suppling current when DCIN is disconnected. Oke, all working now!

It just randomly went on after going deeper. Is it possible to leave S5_PWRGD out? Or would it make the system very unstable? With BAT only it won't turn on. On Q7155 with battery only connected Pin 5 = 7.8 Pin 1,2,3 = 0 Pin 4 = 0 On Q7155 with battery and Charger connected Pin 5 = 7.8...

Dear, No green light. I'm measuring on Pin 3 a short to ground. R7110 on the right side: PPCHGR_DCIN = 16.5 R7110 on the left side CHCR_ACIN = 0 All other meassures on U7100 seems fine. Pin 2 = 16.5 Pin 12 = 3.5 I guess I need to replaec my ISL. right?

Studing very fast. Angry teacher is the best! Why do many MacBook Air 820-00165 show red light without a battery attached?

SMC_ADAPTER_EN = 3,4 PM_BATLOW_L = 1,0 PM_DSW_PWRGD = 1,0 the rest i need to see what is all that.

Angry teachers is most likely to learn fast. Keep screaming. I learn twices as fast. PP3V3_S5 = 3.3 PP3V3_SUS = 0.001 Sorry, i Guess it was not so smart to inject AMPS.

Thanks for reply Amigo: There is no short to ground on PPBUS_G3H I have a steady 8.59v C7582 was shorted, I know how to find shorts with my DC power supply. Just to stupid for diode mode. Hope to learn from you. C7582 was burning on my FLIR camera on 4amps 1v. I removed and the short was gone...

Dear, I try to read from other Threads, but I see to get stuck. C7582 was short. Removed and replaced. After that laptop worked fine. But after 10 seconds the same Talanoium Capacitor was short again. Now I removed C7582 and there is no fan spin no boot. The light charger is red without...

I have the same thing and PP3V42_G3H it drops to 2.6v and then goes back to 3.4. Is this normal?

Thanks, checked R5100 which had abnormal values. Checked J6100, saw a little debris. Cleaned it and the MacBook works again. Thanks!

Hi, I am fairly new at this but i've the following MacBook Air A1466 PPBUS_G3H it present but a little low and i think the SMC stays in reset mode. I've measured the following power rails: PPBUS_G3H = 8.20 volts PP3V42_G3H = 3.416 volts SMC_RESET_L = 0.754 volts U5110 voltages: pin 1 =...

Dear users, I have a 820-00840-A. No liquid damage or any other visible damage, only screen replaced 1 year ago. Worked until today. When you open the laptop for 2 inch, it shows backlight. But as soon as you open the screen completely the whole backlight fates out and stop working. When i...