hi. i'm new to daniweb and i'm a hybrid electronics repair guy that works on everthing including laptop motherboards. i reflow bga chips and just lately have been getting into reballing bga's. i am usually pretty good with diagnosing and repairing power issues like no power, won't charge battery or won't run off battery. i can usually narrow it down to a resistor or a diode or one of the 8 leg voltage regulators on the power / charge controller. right now i am having a problem with a presario v6000 that has me stumped and i am hoping someone can help me out. when you plug the laptop in the power supply shorts and the green light on the ps goes out. when troublshooting the mobo i found a voltage regulator next to the 4 pin plug the power jack board plugs into that appeared to be shorted. the four pins on the 4pin connector side of the voltage regulator are all soldered to ground, 3 of the pins on the other side of the voltage regulator are all soldered together to the same trace and one pin stands alone. i am assuming this pin is some type of sd pin. by the way forgot to mention the blue light next to the dc jack did not light up when plugged in. when i checked continuity between the 4 pins soldered to ground and the 3 pins soldered together i got .013 which indicated the regulator was shorted. there was no continuity between the sd pin and any of the other pins. when i desoldered and removed the voltage regulator from the board the blue light on the power jack board lit up when plugged in with no power to the mobo. i replaced the regulator with one that had the same numbers and was verified with ohmmeter not to be shorted. i plugged the power supply in and had the same problem, ps shorted and green light on ps went out. rechecked continuity on voltage regulator and verified was not shorted. it would appear that some other component was damaged when voltage regulator shorted out but i can't seem to trace it down. does anyone know the fix for this problem? could it be the maxim chip? any info would be appreciated. thanks for taking the time to read this.
dissavowed 0 Newbie Poster
Be a part of the DaniWeb community
We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.