Computer starts but nothing shows up on screen

[the-gaming-alien]

Hello folks, a couple days ago everything was fine untill i turned my pc off for the night. After that, the computer seems to boot up but does not display anything at all on screen (screen keeps saying "no signal").

Specs:
Mobo: GIGABYTE 78LMT
CPU: AMD Phenom II X6 1055T (6 core 2.8ghz)
GPU: AMD ATI Radeon HD 5770
RAM: 2x4gb
PSU: acbel ce2 450

Here's a couple of things i have tried so far:
Switching HDMI cables.
Testing video card in different computer (It worked).
unplugging power cable and holding power on button for 30 seconds.

I don't believe it would be the motherboard since it is still very new (2 months old). I do not own a multimeter to test the power supply sadly.

Any and all help will be greatly appreciated!

 

[Luke Kirke]

When you say you unplugged the the power cable, have you tried that with the monitor? At the last company I worked at we had this issue a few times and we would just unplug the monitor for 30 seconds then plugged it back in. Hope this helps

 

[the-gaming-alien]

When you say you unplugged the the power cable, have you tried that with the monitor? At the last company I worked at we had this issue a few times and we would just unplug the monitor for 30 seconds then plugged it back in. Hope this helps

Yeah I've tried it with the monitor as-well, but with no luck sadly.

 

[DzOnIxD]

See if your video card or RAM is plugged properly

 

[the-gaming-alien]

See if your video card or RAM is plugged properly

Yep, just triple checked then. It's all plugged in properly.