Hello,
Motherboard is in very good optical condition. The problem is that vcore=0v. I checked the power of the PCH, there is no short circuit, 1.8V, 1.5V, 1.05V, 3.3V are present. The chipset gets quite hot after a while without a heatsink (60-70 degrees). The original ISL69138I chip did not previously have pwm, but vcore/vgt_pwrgd=3v, vr_rdy=3v, vrmpwrgd=3v, vcore=0v, pltrst#=0v.
At first I thought it was a bad chip, I ordered a new one, soldered it, flashed the BIOS from the original site version F5, now pwm=1.7v on all phases, pwrgd=0v, vrmpwrgd(vccst_pwrgd)=0.1v, vr_rdy=0v, vcore=0v. Vccpll, vccpll_oc, vccfuseprg = good. Vccsa, vccio are good too.
I then flashed EC=IT8795E from the x299 aorus dump, no change. The bios chip has a voltage spike on pins 5,6 (clk, mosi) when a button is pressed, after 1sek=0V. SIO IT8688E pulls vrmpwrgd up to 100 mV. When I cut the trace from the SIO to the chipset, the voltage on sio=100mV on the chipset=3.02V, and also 3V on the chipset when the motherboard is off, when I plug the sio back into the circuit, no change. PWROK comes from EC - it's 3v. The vcore voltage without cpu is 0.28v when the motherboard is off, goes to 0v and then slowly rises to 0.28v when i turn on the motherboard. The vcore/vgt_Pgood signals stay at 0V without a processor. Also, 12V dumny load circuit with Q9 resistors => very hot, 90 degrees, transistor has gate = 3V and source/drain 0V, resistance across is 60 ohm, maybe it's ok? This is the second time I see hot resistors here.
Any help is welcome. I have all the tools except the oscilloscope. The DMI tracks are ok, I checked.
Motherboard is in very good optical condition. The problem is that vcore=0v. I checked the power of the PCH, there is no short circuit, 1.8V, 1.5V, 1.05V, 3.3V are present. The chipset gets quite hot after a while without a heatsink (60-70 degrees). The original ISL69138I chip did not previously have pwm, but vcore/vgt_pwrgd=3v, vr_rdy=3v, vrmpwrgd=3v, vcore=0v, pltrst#=0v.
At first I thought it was a bad chip, I ordered a new one, soldered it, flashed the BIOS from the original site version F5, now pwm=1.7v on all phases, pwrgd=0v, vrmpwrgd(vccst_pwrgd)=0.1v, vr_rdy=0v, vcore=0v. Vccpll, vccpll_oc, vccfuseprg = good. Vccsa, vccio are good too.
I then flashed EC=IT8795E from the x299 aorus dump, no change. The bios chip has a voltage spike on pins 5,6 (clk, mosi) when a button is pressed, after 1sek=0V. SIO IT8688E pulls vrmpwrgd up to 100 mV. When I cut the trace from the SIO to the chipset, the voltage on sio=100mV on the chipset=3.02V, and also 3V on the chipset when the motherboard is off, when I plug the sio back into the circuit, no change. PWROK comes from EC - it's 3v. The vcore voltage without cpu is 0.28v when the motherboard is off, goes to 0v and then slowly rises to 0.28v when i turn on the motherboard. The vcore/vgt_Pgood signals stay at 0V without a processor. Also, 12V dumny load circuit with Q9 resistors => very hot, 90 degrees, transistor has gate = 3V and source/drain 0V, resistance across is 60 ohm, maybe it's ok? This is the second time I see hot resistors here.
Any help is welcome. I have all the tools except the oscilloscope. The DMI tracks are ok, I checked.
