Question When PC is turned on RED CPU light flashes on for a few milliseconds then shuts down entirely. Can't seem to fix. HALP!

Feb 9, 2021
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I am using the following parts

AMD RYZEN 5 3600 6-Core 3.6 GHz (4.2 GHz Max Boost) Socket AM4 65W 100-100000031BOX Desktop Processor
https://www.newegg.com/amd-ryzen-5-3600/p/N82E16819113569?Description=AMD Ryzen 5 3600&cm_re=AMD_Ryzen 5 3600-_-19-113-569-_-Product&quicklink=true

MSI B450 TOMAHAWK MAX AM4 AMD B450 SATA 6Gb/s ATX AMD Motherboard
https://www.newegg.com/msi-b450-tomahawk-max/p/N82E16813144267?Description=msi b450 tomahawk max atx am4 motherboard&cm_re=msi_b450 tomahawk max atx am4 motherboard-_-13-144-267-_-Product&quicklink=true

CORSAIR VS Series VS600 600W 80 PLUS Certified Non-Modular ATX Power Supply, CP-9020224-NA
https://www.newegg.com/corsair-vs-series-vs600-cp-9020224-na-600w/p/N82E16817139266?Description=power supply&cm_re=power_supply-_-17-139-266-_-Product

MSI GeForce GT 1030 DirectX 12 GT 1030 2GD4 LP OC 2GB 64-Bit DDR4 PCI Express 3.0 x16 (Uses x4) HDCP Ready Low Profile Video Card
https://www.newegg.com/msi-geforce-gt-1030-gt-1030-2gd4-lp-oc/p/N82E16814137318?Description=graphics card ddr4&cm_re=graphics_card ddr4-_-14-137-318-_-Product&quicklink=true

Lenovo ram ddr4 8GB desktop Gaming memory 2666MHz Interface Type 288pin 1.2V memoria rams ddr 4 for PC
https://www.newegg.com/lenovo-8gb-260-pin-ddr4-so-dimm/p/0RN-00Y6-00003?Description=RAM ddr4&cm_re=RAM_ddr4-_-9SIATTBDDE3695-_-Product

When turning on pc cpu light flashes for a millisecond and everything shuts down, I double-checked the connection to the power supply and that the reset and on switch has been wired properly.
 

Paperdoc

Champion
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One of the common causes of short circuits in a brand new assembly is that one or more case stand-offs is in the wrong position, OR that none ever were used at all. See my post of Dec 12/20 in this thread

https://forums.tomshardware.com/threads/is-it-okay-to-take-apart-a-computer-and-put-components-into-a-new-case-or-will-this-result-in-a-lose-of-data.3670519/#post-22107308

It was written for someone who planned to move his system to a new case, but it applies to your situation as you mounted everything in a new case. If you have any reason to suspect the stand-off location is involved, I suggest you unscrew all the screws (often nine) that hold the mobo in the case, and remove it carefully. Then study closely whether every one of the stand-offs is exactly where a mobo mounting hole is.
 

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