Debug Boot LED light MSI B350 Bazooka

Mar 1, 2018
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A mont ago, i bought a new gaming rig:
- Ryzen 3 1200 (W stock cooler)
- MSI B350 Bazooka
- 2x4 GB DDR4 RAM
- 1TB 7200rpm HDD
- GTX 1050 ti
- 550W Ozone gaming PSU

Everything was very fine since yesterday. My friend bought a 2x8GB ddr4 RAM and we both wanted to test it (I wanted to test 16gb ram on games) on my rig. So i was running the PC when he arrived, so i switched it off, removed my ram and put my friend's ram in the same slots.
Here's the problem: Nothing was displaying in the monitor, was absolutely black screen. I took a look inside the case and the Boot EZ Debug LED was running.
When i switch on the pc, first the CPU and DRAM led turns on, a sec later they turn off and then the VGA LED turns on for a sec and turns off. Then the Boot LED turn on and nothing happens.
I've tried reseating the ram sticks and still isnt working :( Please, can anyone help me?

(Sorry for my bad english, i'm currently learning)