I have this motherboard and it was shorted somewhere on main 19v line...or after...Finally after many desoldering and using boardview and schematic it was shorted mosfet on cpu power rail... Now its all ok but i have two noob questions:
1. Could i have used bench power supply and set it on 19v with 1 amp limit to main 19 v power rail to find what is hot or it would burn something on the way like cpu because it was shorted through the mosfet? I read many articlas and many forums...and some people are saying no,no,no, it is not good idea to use 19v on shorted motherboard on main power rail..and other says it is ok if you set limit to 1amp and that way cpu or gpu will not be destroyed? What do you think?
2. And second, why there is a difference in reading on bench power supply in a way...Let say if i set limit to 1.5 amp and short the probes it would show some value of voltage...and that is complete short (two probes touching) but if i apply those probes to a short to gnd rail on the motherboard it will show different voltage? And that rail is also shorted to gnd (0 ohms) but it will show different voltage...meaning there is resistence?? But how if it is shorted?
Thx for answers.
1. Could i have used bench power supply and set it on 19v with 1 amp limit to main 19 v power rail to find what is hot or it would burn something on the way like cpu because it was shorted through the mosfet? I read many articlas and many forums...and some people are saying no,no,no, it is not good idea to use 19v on shorted motherboard on main power rail..and other says it is ok if you set limit to 1amp and that way cpu or gpu will not be destroyed? What do you think?
2. And second, why there is a difference in reading on bench power supply in a way...Let say if i set limit to 1.5 amp and short the probes it would show some value of voltage...and that is complete short (two probes touching) but if i apply those probes to a short to gnd rail on the motherboard it will show different voltage? And that rail is also shorted to gnd (0 ohms) but it will show different voltage...meaning there is resistence?? But how if it is shorted?
Thx for answers.
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