I initially had a short to ground ,, AND,, the power cord ( AC adapter ) light would turn off. I found the short on mosfet pq607 and replaced the bad N-channel mosfet. Now the charger stays on and this enables me a better chance to test with actual voltage. The next issue is no power, I get voltage in 20 volts,, and the power board receives 5 volts. Chips U3 and U4 are NOT getting power. Not sure where they pull the voltage from... I included the schematic, any help is appreciated.
I found the shorted mosfet and now I have power to the board, I than found another short on a resistor on the power board. replaced the resistor and now I have lights to one side of the power board ( 2 boards off of the motherboard ) I am getting a chip q9 on the ul indicator board that gets very hot right when plugged in. I cannot find the cause for the rapid heating chip. any help? I posted this already wanting any advice that would help..
I found the shorted mosfet and now I have power to the board, I than found another short on a resistor on the power board. replaced the resistor and now I have lights to one side of the power board ( 2 boards off of the motherboard ) I am getting a chip q9 on the ul indicator board that gets very hot right when plugged in. I cannot find the cause for the rapid heating chip. any help? I posted this already wanting any advice that would help..
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