Was saying no signal, now won't turn on.

[Heidi4gigz]

Hi. I am having problems. I hv 2 monitors, the latest one u connected kept saying no signal. I was unplugging computer, hold on button off for 60 secs. Sometimes it worked after reboot my monitor worked..Now my display won't turn on. It tries but doesn't. I hv spent the day cleaning inside computer, cleaning the ram slots n replacing them.
Not sure what is happening..if i can't see, how can I even get stuff off this computer onto even a new one?.
Forgot to mention- it's a Dell inspirion 570 tower. It's been a great computer.
I know my harddrive is almost full.
Any suggestion?

 

[Lakken]

Have you tried to use the onboard gpu? to see if the monitor get the signal

Check all the cables both inside and outside.

You can also try to reset bios. unplug all cables, remove MoBo battery, press and hold the power button for 20 sec. Wait 5 min, then put the battery back in and the cables. Restart.