IndiaReFix - Laptop & TV Repair Forum

I got this motherboard few days back when plug in to dc it goes up to 0.7amp and stuck .

later i found that PL30, PL32,PL34,PL35,PL37 coils are shorted to ground.

I,m sure all these coils are not shorted to ground due to cpu on board.

its a bga chip.one of above shorted to ground.

if i can remove the cpu its easy to find and here iam stuck due to cpu on board .

please give me a solution to find the genuine shorted rail.

schematic is attached ..Thank you very much

schematic for r62

to find the short rail please apply the same or lower volts to the rail with your power supply. if 3.3 volts rail short then plz apply 2.5 to 3.00 volts to that rail just solder two wire and connect to your supply unit by which you can adjust the volts and amps in accordance.

Arun.shspl wrote:to find the short rail please apply the same or lower volts to the rail with your power supply. if 3.3 volts rail short then plz apply 2.5 to 3.00 volts to that rail just solder two wire and connect to your supply unit by which you can adjust the volts and amps in accordance.

Thank you Mr. Arun for your time. I used to do that when i find the relevant rail. here i am stuck with many rails . Any way will apply lowest voltage in all rails and post here the result .Thank you very much!!

When I inject 0.9v to PL34 CPU is warming up.will check for that rail .if cpu is faulty god bless.