New Build troubleshooting

This is my build, I just put it all together but I am not getting any display on my monitor, everything turns on but there is no display, neither my mouse or the keyboard turns on. What could be the issue?

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[PCPartPicker Part List](https://pcpartpicker.com/list/HQ2Ykd)

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Type|Item|Price

:----|:----|:----

**CPU** | [AMD - Ryzen 3 2200G 3.5 GHz Quad-Core Processor](https://pcpartpicker.com/product/RkJtt6/amd-ryzen-3-2200g-35ghz-quad-core-processor-yd2200c5fbbox) | $84.99 @ Newegg

**Motherboard** | [MSI - B450M GAMING PLUS Micro ATX AM4 Motherboard](https://pcpartpicker.com/product/9C97YJ/msi-b450m-gaming-plus-micro-atx-am4-motherboard-b450m-gaming-plus) | $79.99 @ Amazon

**Memory** | [Corsair - Vengeance LPX 16 GB (2 x 8 GB) DDR4-3200 Memory](https://pcpartpicker.com/product/p6RFf7/corsair-memory-cmk16gx4m2b3200c16) | $99.99 @ Amazon

**Storage** | [Kingston - A400 240 GB 2.5" Solid State Drive](https://pcpartpicker.com/product/btDzK8/kingston-a400-240gb-25-solid-state-drive-sa400s37240g) | $29.99 @ Amazon

**Power Supply** | [Corsair - CXM (2015) 450 W 80+ Bronze Certified Semi-Modular ATX Power Supply](https://pcpartpicker.com/product/FQ648d/corsair-power-supply-cp9020101na) | $32.98 @ Newegg

**Monitor** | [Acer - SB220Q bi 21.5" 1920x1080 75 Hz Monitor](https://pcpartpicker.com/product/GLm323/acer-sb220q-bi-215-1920x1080-75-hz-monitor-sb220q-bi) | $89.99 @ Amazon

| *Prices include shipping, taxes, rebates, and discounts* |

| Total (before mail-in rebates) | $432.93

| Mail-in rebates | -$15.00

| **Total** | **$417.93**

| Generated by [PCPartPicker](https://pcpartpicker.com) 2019-05-08 16:06 EDT-0400 |