HDMI to VGA not working

I recently got an old tv from the thrift store and it was working fine until the hdmi port, from what I assume, broke off the motherboard (not sure if that's the right name sry). So I got an HDMI to VGA adapter and tried it however it still is in TV source instead of PC source. What should I do to fix it?

Model code: LNR238WAX-XAA

Here's the link to what my tv is: https://www.bhphotovideo.com/c/product/426415-DEMO/Samsung_LNR238WA_LN_R238W_DEMO_23_LCD.html