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Hi All, This is a liquid damaged board. Keep on rebooting. Even with USB installer. Tried with out lifeboat still the same. With out lifeboat and USB OSX flash question mark is stable. Tried bios clean me, SMC replaced. No luck. I saw the same issue with bellow forum. But not solved...

Hi all, this is not a LQD dmaged board. All the power rails are ok. turns off after around 20 mins. Any help greatly appreciate

Hi Huys, Just to let you know I replaced the CPU on this just to find whether I can solve this as I got 4 of them same /similar issue. Still behave the same way fan spins for 5,6 secs and fan runs for ever with vcore present no chime no video no usb response. So fa I replaced SMC/ Bios/ PCH/...

Hi Thank you for your quick reply. PLT_RESET_L and RST_BUF_L are 3.3v L/C Blocks get 1.V all of them

Hi, This is not a liquid dmg board. Board is pretty clean I have all the power rails including vcore. Fan spins for 5 sec then stop and spins for ever. Clock chip signals are fine but replace the clock chip, SMC, test with different bios to see whether it chimes still same behaviour. Put...

Thank you for your advice. I have orderd new FDMF chips . Will update you asap

Hi All, This is not a liquied dmg board. it boots some times and post but no chime. some times fan spins for 5 secs, stop then fan spins again. both times all the power rails are present. Tried to reflow SMC works couple of times then back to quater fan spin and continue. I checked in the...

Hi This is solved. Issue was Audio codec not sending AUD_GPO_3 signal. replaced U6201 and solved. Thanks

HI , This is a liquid damged board. no chime no audio. First PP4V5_AUDIO_ANALOG was missing and fixed that soldering wire to U6200 REG_IN. Now I can see the internal speakers on osx and volume control works as well but no sound. greatful if can give me any clue.

Hi, Thank you for your reply. Sorry couldnt mention I did check all the power rails and all are exactly the way it should be including CPU_VCORE. checed voltages on Blocks newar CPU edge of the board and they are getting the voltage suppose to get. Do you think this is CPU by itself?

yes fan whent max high speed then stop as before.

solder wire on R5115/16 for SMC bypass still same.

Thank you for your reply. Pin 3/U/1950 goes to 3.3v for 3sec and also PT_RESET_L goes 3.3v only for that fan spining 3 secs. I dont know how to bypass SMC. I checked with same 820-00165 bios to see whether it turns on but same situation. I check with 820-3437 bios then I get continue fan...

Hi , This is not a liquied dmged board. resi I get cpu v_core for 3 secs with fan spining then no pp5v_s4. I replaced the SMC, Tried with same board different bios isl 625 and current sensing resistors . Still the same. any clue?

Just to know is DP_INT_ML_C and P required to create DP_INT_HDP?

Hi Solved. Thank you so much for your guidance. As you said I replaced all the caps affected area still was the same. Then I replaced the C8320,C8321,R8318,R8317. Display works. Another successful guidance by 2informatics. Thank you Sir.

HI, it works with external display. boot couple of times with osx . replaced the LCD connector again. Replaced SMC thinking SMBUS_SMC_0_S0_SDA AND SCL pulling down. none of worked. still the same situation. should i get 3.3v with out the LCD on R8362 &R8361 coz I cheked with a working board it...

J8300 traces are fine.

I replaced R8360 and R8350 as 8350 was 50k. I placed and check R8350 was 98k. then powered and same as before. Then I checked R8350 again and its 50k.

no it doesnt come high in that second .0v