💥 First, I check in dc supply reeding 0.004 means vin not pass.
💥 Open the laptop and check the motherboard board and is full temper.
💥 First & 2nd MOSFET miss check All coil value ram coil 0.003 CPU core coil 0.000 at this point I think cpu short
and I have to returned back this laptop but..
💥 I make a decision to give one chance of motherboard, now I turn back the board and remove pc1228 actual value is 330uf but someone put 220uf, now CPU value change 0.000 to 0.001 give me hope.
💥 I forget something VIN also short CLR value 0.003, now my cpu value is okay now decision remove to vin shorting.
💥 Every section has vin jumper pad I remove it one by one and when i cut the ram section vin supply and my vin shorting gone.
💥 Now I have work on the ram section so I remove full ram section like ram ic upper and lower MOSFET now my reeding is 0.003 to 0.048
it's not good enough I trace ram voltage and i found CD39 is leaky I remove it now my ram coil value 0.110.
💥Now i put new ram ic and both PWM MOSFET and check again all coil value now all are pass.
💥 My vin mosfet also miss so I put jumper charger jack to CLR and check-in 30 milliseconds no any section shorting, dc reeding 0.007.
💥 Check first and 2nd MOSFET gate voltage ( I know you think there is no MOSFET why I check gate voltage because if i have 8v or less than 8v then my board trigger otherwise no 3v LDO ) have 8v.
💥Now I press the power button board turn on reeding at 269 and stop there all coil have voltage even GPU coil have voltage but no core voltage.
💥 I check core ic all requirements are ok I also change core ic but sill problem is the same.
💥 I flash bios but still the same now I feel sad ☹️ I thought so my CPU gone.
💥 I also wash full board but still the same problem. then my finger touch somewhere and my reed goes put to 0.800 I think i short the motherboard
I turn off-board and check nothing short by me then turn board same stuck at 0.289 then I heat up the board and again it's going to 0.800 now I check I have CPU core voltage.
💥 when the board cools down the same stuck at 0.289 then recognize when I heat up PCH then I got CPU voltage means PCH dry.
💥 I reflow pch with BGA Machine unluckily problem same thought PCH is die ☹️
💥 Then I see very care full motherboard near PCH have YH2 crystal and their RH89 1M resistor is missing I put a new one
now I turn onboard it's going 400 then 700, 840, 900 back 600.
💥 At this time I have CPU coil voltage but not display yet it's not going for auto short down.
💥 Inboard I have doubt on 2md bios I change new bios hardware and fast both bios.
💥Now I have auto shutdown but still no display on screen I connect USB keyboard I have a display on the keyboard.
💥Again see care-full near display connector QV6 is miss I have the same board I put QV6.
💥 Now I turn the board and finally,💥💥💥 I got a display on Screen.
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