I started troubleshooting this Razer Blade 15 laptop DA560 motgerboard a while back, due to some shorted 19v, 5v, 1v power rails. I fixed some of components and think 19v rail is good, 5v rail is good, 3v is better but not all way i think, and 1v is still bad. At this point the diode reading on these rails are 19v - 0.032v , 5v - 0.167v, 3 - 0.63v and 1v - 0.005v .
When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip, when installed it brought diode reading from 0.063v to 0.005v with .500 amp draw on 3.3v 1a bench power supply. So im asking is the EC chip getting warm cause its connecting part of shorted circuit within chip or just normal ops cause it got volt applied to it?
One other question. When i applied bench power 3.2v or 5.2v 1.5a, to the fuse where the power comes in, it takes bench power down to 2.91v with max 1.5a draw. And the mosfet after the first 2 in rush mosfet is showing warm on cam. I swapped the warm mosfet with new one with same result. So im thinking its doing its job shoving volt to ground see that there is fault in system ? Is this correct?
Im still kinda new to laptop motherboard repairs and trying to get this.
When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip, when installed it brought diode reading from 0.063v to 0.005v with .500 amp draw on 3.3v 1a bench power supply. So im asking is the EC chip getting warm cause its connecting part of shorted circuit within chip or just normal ops cause it got volt applied to it?
One other question. When i applied bench power 3.2v or 5.2v 1.5a, to the fuse where the power comes in, it takes bench power down to 2.91v with max 1.5a draw. And the mosfet after the first 2 in rush mosfet is showing warm on cam. I swapped the warm mosfet with new one with same result. So im thinking its doing its job shoving volt to ground see that there is fault in system ? Is this correct?
Im still kinda new to laptop motherboard repairs and trying to get this.
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