2013 mac pro processor upgrade no inner torx screws

Does anyone have an idea of what can I try with the Mac Pro, maybe a way to fix it? Could it be the internal UPS? Some help please.

So i tried the smc reset, tried nvram, power cycle, etc and it stills the same, I don’t know what to do I live in Peru so we have no apple stores, just reseller ones, and I’m afraid that they mess up, give fake reports or overcharge for a piece its working fine. So, it finally happened, my Mac Pro 2013 won’t turn on, I’ve been experiencing some power issues in the past months, (Mac Pro 2013 Mojave 64 ram 6gb video) like sometimes I pressed the on button and I had to press it again, I though I hadn’t pressed strongly enough the power button but in the last week, I swear I heard the booting sound but I didn’t see the apple logo so I pressed the power to turn off the Mac and then the computer booted right, but now, the Mac Pro apparently couldn’t get enough power to boot, I see the light in the usb, thunderbolt 2 area, but when I press the power button I see the “Power” light trying to hold bright but it resets, and then again, and it resets and again and again, while hearing a sound like a mechanism trying to start but it cuts.

2013 mac pro processor upgrade no inner torx screws