Why does my aftermarket stereo play sometimes and other times won't?

I installed my aftermarket Dual brand stereo on Friday 3/15/2023 and it came on as soon as I pushed power, It worked great til Sunday 3/17/2023. I went out sunday morning and no power at all to radio. I pulled radio out and made sure everything was hooked up still and everything was fine. Pushed power button and radio came on, and played fine the rest of the day. I go to take kids to school Monday morning and no power again. Right before I got back from dropping off kids, the radio powers on but the screen was 4-5 different colors, and you could barely see the Dual logo in the center of the screen. I unhooked stereo and haven't hooked back up since then. It's got me puzzled. Could someone help me please?