H505 PC cannot connect to monitors

A few days ago, I turned on my PC H505. After activation, the monitor went instantly in mode 'sleep'. I had this problem since then, regardless of monitor I connect to my PC goes to sleep. Even the monitors who work on other computers just fail to connect to mine. I changed the VGA cable, and the same problem occurred. I wonder how this might be happening and how to fix it. Is there a part that is defective? Help, please.

Oh well, thanks for all the help everyone... .... In any case, I thought that the problem myself. There was an electrical problem in my graghics card, causing the map graghics not being able to connect to my monitor. Thank God I don't have to buy a new computer!

Tags: Lenovo Desktops

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