Question Why am I losing signal to my TV

Feb 28, 2019
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Hi my PC was working perfectly and was playing games such as elite dangerous and elder scrolls online which my computer is running all higher specs than is needed for these games. But I had to completely move the PC and other things in my front room as am having work done. So I have replugged PC back up and gone to play turznquest and any other game and upon launch it spits out a 3 second sound of the game and then loses signal to my PC. My expertise would suggest I need to replace graphics card as it works fine for windows and internet but for games loses signal any ideas if a replacement is needed or not.