Question no signal on monitor + computer randomly turns off then back on after 2 seconds

Mar 3, 2019
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so a couple days ago my pc was running completely fine. Prior to this, i ordered another 8gb stick of ddr4 ram for my pc. when it arrived, i turned off my pc, opened the pc and installed the second ram stick. But when i tried to turn the pc on, it would just say "signal not found" And now when im doing tests trying to get it to turn back on, the PC randomly turns off and after a second or two it turns back on. I know that it has to be something wrong with the computer because when i plugged the exact same monitor into my old laptop, it worked perfectly fine.

I have already tried removing my gpu and putting it back in, resetting CMOS, cleaning my ram, removing my new stick of ram and more. Any advice is greatly appreciated
 

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