acer Aspire TC-780 Pc on, all components running, black screen.

Hello, it's been 4 months or more that i got this problem.

A day, my computer crashed and shutted off, and when i turned it on, there was a black screen.

1 Year ago, i bought 2x8gb 2666mhz ram for my acer Aspire TC-780 that had 8gb 2133mhz of ram, and was working perfectly.

Sometimes, i had to remove ram, turn on the pc(continouos beep), and put the ram back in, it shutted off automaticallt, and when it rebooted was working perfectly.

Now, when i do the same thing, doesn't work, it reboots few times, but no signal. Power led off too. I changed CMOS battery too.

Also, i bought a new graphics card(GTX 1080 Ti) and a new 550w psu because the gt 730 and 220w psu wasn't enough for the games i play.

I made a mistake too, i broke a socket pin by cleaning the thermal paste. I think it's a VCC pin(lga 1151 skylake i5 6400). Idk if that is the main problem.

Another thing, when i put my old stick of 4gb ram, it worked without no problem, but now the ram broke.

Can someone help? Thanks!

[Edited the thread to add model name to the title]

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billsey

There were two different types of the TC-780 models. Which CPU does yours have, the 6th generation or 7th generation? IIRC they both use 2133MHz memory, so the 2666 you put in might be the problem. Usually 2666 will down clock to 2133 without issues, but perhaps the ones you used are iffy at the lower speed.

23kxFra

https://community.acer.com/en/discussion/comment/1252836#Comment_1252836

Hello, it happened agian. I was playing and the pc crashed making a continousvloud noise drom my headset and got no signal, but the pc was running. My cpu is the i5 6400. Thanks