TaPaKaH Posted December 21, 2018 Share Posted December 21, 2018 (edited) Over the last few years, the board has been on LN2 about a dozen times and every 2-3 sessions it would arrive in a state where it would shut down and no longer react to the power button. The only way to get it back to work was putting it in a 120c oven for 10 minutes or so. However, after its most recent breakdown + ovening it now exhibits the following behavior: - With Seasonic Titanium 1000W: no reacton to power button at all - With Corsair AX1500i: it powers up, but shuts down before it completes POST - With Silverstone OP1000: it powers up and works perfectly fine. But, if I set the Vmch to any value other than [Auto] in the BIOS, the board shuts down during POST with a OCP/OVP-like click coming from somewhere in the chipset PWM area. If I boot into OS at [Auto] value and raise the Vmch using the TweakIT thingy - system works fine, even handles LinX load with a quadcore. If I adjust the BIOS settings so that the [Auto] value no longer induces the default ~1.25V, I get the same shutdown on POST. Also, the same happens when I set the "EPU Phase Control" option in the BIOS from [Auto] to [Extreme]. But this might be due to [Auto] option for Vmch changing. I tried ovening it some more. I tried flashing other BIOS version. I tried a BIOS chip from another board. I tried different kinds of CPUs. Nothing seems to help and I'm out of ideas. Any advice / help is welcome. EDIT: pictures of the chipset PWM area:https://abload.de/img/img_0525ezivo.jpghttps://abload.de/img/img_0527akc2u.jpghttps://abload.de/img/img_0528q6fho.jpg Edited December 21, 2018 by TaPaKaH 1 Quote Link to comment Share on other sites More sharing options...
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