MOTHERBOARD DEAD CONDITION NO POWER ON NM-D031 10TH GENERATION LENOVO

Case study: 1 ( NM-D031 10TH GENERATION LENOVO) (1) MOTHERBOARD DEAD CONDITION NO POWER ON (3) DC POWER SUPPLY READING 0.027 AMP. (4) CHECK ALL COIL FOR SHORTING , 5VALW COIL FOUND SHORT WITH GROUND. (5)CHECK 5VALW GENERATE IC AND IT WAS SHORT. FOUND NEW IC BUT NOT AVAILABLE IN OUR LOCAL MARKET. SO I INSTALLED BULK CONVERTER REPLACE WITH IC. (6) NOW 3VALW & 5VALW COMES OK. (7) NOW DC READING 0.017 AMP. (8) TRY TO TRIGGER BOARD BUT NOT TRIGGERED. (9) CHECK IO CHIP REQUIREMENT INPUT SUPPLY. 3.3V SUPPLY OK BUT REQUIRED VCC SUPPLY 1.8V ALW NOT OK . CHECK NEXT STEP. (10) EC_ON OK, ON/OFF OK, PBTN_OUT# OK, LID_SW# OK. (11) CHECK BIOS ALL PIN AND GETTING SOMETHING WRONG WITH PIN NO. 1,2, & 5 (0.67 VOLTAGE ON PIN 1 & 2 AND PIN NO 5 GETTING 2.75V SOMETHING) WHICH WAS TOTALLY WRONG. (12)SO CHECK WITH EC_RSMRST# AND EC_RSMRST# NOT COMMING SO CHECK REVERSE AND GETTING THAT ITS COME FORM 5V IC POWERGOOD. (13) CHECK POWERGOOD OF 5V IC AND GOT PULLUP REGISTER 100K VALUE SHIFTED WITH 10K . REMOVE REGISTER AND JUMBER IT. (14) THEN BOOM....... 3.3V EC_RSMRST# COME. (15) DC READING OK. NOW TRIGGER THE BOARD AND ITS POWER ON BUT NO DISPLAY (16) LAST REPROGRAM THE BIOS WITH SELF MADE BIOS FIILE ANDDDDDD BOMMMMM..BOMMMMMM.......DISPLAY COME 👍👍😄😄😄😄😄👍👍👍 CASE SOLVE ONLY WITH INSTALL BULK CONVERTER Rs. 50/- (ITS VERY IMPORTANT PARTS FOR EVERY ENGINEER) THIS TIME VERY HAPPY TO SOLVE THE CASE WITH ACTUAL KNOWLEDGE OF CHIPLEVEL REPAIRING 🦾🦾NOTHING IS IMPOSSIBLE IF PROCESSOR IS ALIVE IN SOC MOTHERBOARD 🦾🦾 Copyright Case Study For Learning