Booting into fastboot? topic

I started my phone up the other day and it went straight into fastboot and said flash failure at the bottom. I thought it was no problem so I restarted it and did it normally and worked, But now my phone died so I tried recharging it but it sits at the fastboot screen and never seems to charge. I tried connecting it to RSD but for some reason it's not showing up. Anyone got a solution?