gpu not working after shut down

Hello, anyone know how to fix my RX 5700 not giving display after a restart? but my computer was still able to boot to windows? with the GPU (I can still use my integrated graphics.) The card works fine. No artifacts, No BSOD, No crash It just suddenly decided to not give a signal after the...

Mobo: Gigabyte H81 S2PV Ram: 2x 4gb DDr3 1333Mhz GPU: Zotac 1050ti mini PSU: corsair cv450 (I had a nonbrand 550-watt power supply when the problem starts) (I use an HDMI to VGA converter for my GPU ) Everything was running fine, but one afternoon after an unexpected shutdown, I found out that...