Reply 17760 of 27790, by fool
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Today I repaired Soyo SY-5EAS motherboard. Voltage level on Vcore was very low, 0.7-1.1V after MOSFET.
Found broken shorted MOSFET by measuring voltage drop of gate resistor. Because MOSFET gate impedance is very high, there should be very low voltage drop. This one had several volts due to gate(1) pin was shoted to drain(2).
After MOSFET replaced this motherboard posts fine. Wonderful feeling...
Toshiba T8500 desktop
SAM/CS9233 Wavetable Synthesizer daughterboard
Coming: 40-pin 8MB SIMM kit, CS4232 ISA wavetable sound card