ASSISTANCE REQUIRED - TUF Z370-PLUS gaming motherboard

May 8, 2018
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Okay so. Im so hopeless with all this. Im going to put down everything i bought for my first pc (which on the site said it was compatible)
And could someone explain why when i go to power up, the light with flash on and turn straight off, the fans try to spin but only for 2 or 3 seconds.

Power - ATX corsair CX750M
Ram - corsair vengeance LPX 2x8 DDR4
intel i5 7400
Gigabyte Windforce graphics cards
And as above mentioned
TUF Z370-PLUS gaming motherboard.

Now, is there something obviously wrong with this set up? Or should it work if I've put it together properly