hello guys,
need some advice
have to repair a PB laptop, with la-7092p motherboard
at start : no led, no power, totaly dead
19v not present after 1st mosfet, short to ground. found upper mosfet on +1.5V that was short (between 19v and 1.5V), lower mosfet between +1.5 and ground is ok
RAMS are dead too i think : after changed mosfet, short remove without rams and reappears when rams plug in. if i put a new ram, no short at all.
if i remove rams : i have 19v , 3.3v , 5v but no +1.5v and no 0.75v (that's normal i think cause it cames from +1.5V)
the regulator that generates +1.5V have 3.3V and senseon present, but no outpout voltage (3 lines of 1.5V)
so i think Rams AND maybe CPU dead no ?
i have ordered some regulators to test, but this could be a waste of time.
what do you think guys ?
thanx again !
need some advice
have to repair a PB laptop, with la-7092p motherboard
at start : no led, no power, totaly dead
19v not present after 1st mosfet, short to ground. found upper mosfet on +1.5V that was short (between 19v and 1.5V), lower mosfet between +1.5 and ground is ok
RAMS are dead too i think : after changed mosfet, short remove without rams and reappears when rams plug in. if i put a new ram, no short at all.
if i remove rams : i have 19v , 3.3v , 5v but no +1.5v and no 0.75v (that's normal i think cause it cames from +1.5V)
the regulator that generates +1.5V have 3.3V and senseon present, but no outpout voltage (3 lines of 1.5V)
so i think Rams AND maybe CPU dead no ?
i have ordered some regulators to test, but this could be a waste of time.
what do you think guys ?
thanx again !
Comment