With ac adaptor n battery connected, I am only getting 8v at Vin (see diagram
Page 29). I m expecting 19v here. This is not normal isn't it ?
Btw I have already change the IC pu10.
Dcin at Pin 2 = 19v
Adet pin 3 = 3.5v
Acok pin 14 = 3.3v
Vdd pin 19 = 5.1v
Above voltage looks normal. Ie without switching on the laptop yet.
I also have 3.3v available. So pu6 is working.
But no 5v from pu5. Meaning system is not turn on yet.
At v_chg is 19v.
I am not able to fix the laptop. I have already sold it away. Are u getting Vin abt 8.5v ? My initial thought was 19v, but I think 8.5v should be normal for this laptop. Then the power ic is fine.
I saw someone online heating up the CPU area, and it solved the blinking keyboard issue. So it could jus be some weak solder joints.
hmm, sorry to hear that, yes i have 8,5 V Vin, mosfets looks okay, i tried reflowing cpu, but nothing, only that one chip is heating like hell. I accidentaly touch some resistors near it and one fan turned on
im wondering, can i swap cpu to normal yoga 2 13? i know its soldered on i have usable equipment, in my yoga 2 13 is i5 4210u 3MB cache and only 4gb ram :/
or LCD screen ? it have different cables, but eDP should be same on lcd pannel, swap 4k to yoga 2 with 1080p sreen
i will wait for IC from ebay, Now i am only looking for what can be done.
Comment