Hey guys, can you help me out?
One of my friend send me a legion7 mobo, which was dead for good.
He tested it after a keyboard replacement, its worked smooth, he turned off, than next day its never turned on again.

Its led indicators near the usbs are glowing up, when i press pwr btn they turn on, and stays on till i turn the mobo off. Its do the same with and without battery.

The cpu warms up sightly but no image on screen. I have found no shorts on board. Sadly i only have the mobo here with screen and battery.
Im usually into macbooks and i can edit...

Re: 820-01598 Won't charge (only the first time!)

Damn, tried a bunch of stuff. I think its a T2 problem. Tried revive with dfu, same shit.
Replaced U7000 too, nothing. Same stuff. : /

Re: 820-01598 Won't charge (only the first time!)

Update 2
When i have done smc reset its started to charge again and left that 20.20v 0.049-0.037A state. May i need to run a dfu?

Re: 820-01598 Won't charge (only the first time!)



Hey! Thank you for your help
Sure no pwr on board

Source and drain: (Red Pin 1-2-3 and black pin 5)
Something is chargeing up. i put the probe there with 80kOhm function. its shows 60kOhm and increase, there is no constant ohm there.
If i set 800kOhm setting its shows 460kOhm..
In diode red probe on pin 1-2-3 black probe at pin 5 it 1.860
If i change probes its 0.133

Source and gate at resistance
Red probe on pin1-2-3 black on pin4 constant 10MOhm...

Hmm 820-01598 its charge when i freshly connect the battery to the board, if i disconnect charger and connects again it will not charge..

Without battery its works well always! (dont have another battery to try with)

C7034 was blowen up, thats PPDCIN_G3H_CHGR.
Is there a way that Q7030 damaged in the process and can do that?
I could not find short to gnd.

When its not charge its shows 20.48V 0.041A On F7000 i can measure 11V only.

Any idea?

Hello!
Im working on a 820-00165. Its reach PM_SLP_S5_L and its pulsing two times than nothing. After that PP3V3_S4 stays at 0.3V. With SMC bypass the fan spinning for two short times than nothing. It was in another shop (yaay) the original problem was liquid damage around U6100, U7400, U7600, Q8150 and U1950. I replaced everything to be sure its not screwed up from another shop. Even replaced U6100 too to a known good clean one. I created a jumper from R8185 pin 2 to R8167 pin 1. (It was a broken trace) I didn't find any short to gnd on lower levels (S4 - S0) Also replaced U5000, cos they...

Re: Mac air a1466-820-00165-a-lock



Hey! Thank You!

I just found one, it was a tricky one. Yes i searched for these two terms, but 6 bios was wrong for this air, that was the time i wrote that post. In the end i just found one (Maybe from another site, i downloaded about 20efi with emc2925 mark.). Idk what was wrong with the other cleaned efis....

Re: Mac air a1466-820-00165-a-lock

Hey guys! Is there someone who has A1466 EMC 2925 1.6GHz 8GB working clean bios? Sadly the original is useless, damaged. Corrosion on efi connector...
Thanks!

Re: New Members - please post your introductions here

Hello all!
I'm kinda "new" here. Until now i just lurked around here, and read stuff sometimes.
It time to say hi. I'm a board repair engee, live in Hungary. I working on apple stuff mostly. (And hate them more day-by-day)