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    Trying to fix a lenovo l340-15api. 3.3V rail comes on, then immediately goes to zero.

    Thank you. Reseting the BIOS is one of the things I thought might solve the problem, I assumed unplugging the battery and the coin cell would reset it, but I can't be sure if that's the case. I also tried using the reset button in the mobo to no avail. I have already tried desconnecting all...
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    Trying to fix a lenovo l340-15api. 3.3V rail comes on, then immediately goes to zero.

    Hi everyone. I think the title sums it up pretty well. The main voltage rail seems fine, the 5V rail is fine, the 1.1V rail for the CPU looks fine as well, but the 3.3V rail shuts down a split second after power up. I can measure it, just barely, before it shuts down. Meanwhile the power LED...
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