Hello to everyone! I am not a pro at electronics but i have fixed many motherboards except this one that i am fighting to find out whats going one for one week now! My problem is that tps 51427 is overheating and measuring i find out that 6237ldo5 output is 3.23v and not 5v so following this i discover that pu15 G923-330 when i desolder it the 6237ldo5 is 5.2v! So checked datasheet of tps51427 and i notice that ldo is 100mA out and after pu15 it drains 200mA and i think that this is what is causing tps51427 to overheat!Now i try to put 5 volt manually there and wallah motherboard is working booting normally and tps stop overheating! Now i remove the external voltage and Vin of pu15 is 5.23V and out 3.3V and laptop continue to working for 5 min then dies again with same syptoms! What can this be?
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