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piernov
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Last Activity: Yesterday, 06:56 PM
Joined: 01-10-2016
Location: Valbonne, 06
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300-series chipset datasheet is available but it doesn't help that much, the relevant info is left out.
First need to check power rails, depends on the board but should have a 3V RTC rail, a 3V standby rail and a 1V standby/main rail going to the PCH at least.
Then some signals, in particular the RTCRST#, SRTCRST# and RSMRST# signals (input to the PCH) and SLP_SUS# (output from the PCH).
The 32 kHz RTC clock should also be present.
Finally need to confirm if SLP_S4# is completely missing or at least pulsing.Leave a comment:
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Possible yes. CPU with FIVR typically show higher resistance than CPU without. (assuming it is Ice Lake)
1st gen also show higher resistance readings.Leave a comment:
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Or with Intel FITC....Leave a comment:
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There is no DFU restore to perform on non-T2 machines.Leave a comment:
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Output capacitor is required for the LDO to work properly.
Regardless, if there was a problem both on 3V LDO and 1.05V rails, PCH is probably damaged.Leave a comment:
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What matters are the PCH Field Programmable Fuses (FPF). If Boot Guard Verified Boot is enabled in the PCH fuses, then the BIOS needs to be signed for the fused key.Leave a comment:
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Yes, typical short on the RTC power rail sadly. Can happen randomly but yes something on USB can also damage the PCH.Leave a comment:
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LDO output should be 3.3V, if it is 3.0V it is maybe pulled low by a shorted component.Leave a comment:
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Sure that Boot Guard was disabled in the PCH? Need check the report of MEInfo on the running machine before removing CPU…
If it is enabled in the PCH, you can only use it with BIOSes signed with the correct key.Leave a comment:
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@ means no stuff. Resistor symbol with line under it means bridged on the PCB.Leave a comment:
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Dying Nvidia MCP.Leave a comment:
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Usually CPU is dead as a result of a VRM IC/high-side MOSFET short.Leave a comment:
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6-series vs. 7-series. I don't know how good the backward compatibility is, maybe it depends on the BIOS.
In any case, 6-series does not support USB 3.Leave a comment:
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Not possible. RTC_RESET_L is pulled up to PPVRTC_G3H....Leave a comment:
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