Screen permanently blank after connecting to projector (stuck in "projector only" mode)

[Ecologico]

Hello community,

Here is what happened:

I connected my Laptop to a TV via HDMI and then set the screen option to show "projector only" in control panel.

The fn-functions are not working and have never been, probably because I, at some point, disabled Quick Launch buttons or never installed the driver after switching from Vista to Win7.

With the TV still plugged in, I shut down the Laptop.

Now, when rebooting my device, the screen stays black.

Connecting to the same or other TVs via HDMI will show "no signal" on the TV .

Connecting to an external screen or a projector via VGA will show no signal either.

So I am presuming it must be the screen source setting, which would need to be changed back, but I have no clue how to do this blindly. Has anybody got any ideas how I could solve this issue?

Thank you very much in advance!

[Ecologico · Accepted solution]

Removing one of the two RAM Modules fixed it. Just like that.

Hope this can help others solve the issue.

What didn't help:

• Swapping both RAM modules and then booting.
• Resetting BIOS by pressing Windows-Key + B while pressing the power-button.
• Starting the BIOS menu by (repeatedly) pressing f8 or f10
• Pressing the power-button while pressing fn+f4
• Letting it boot normally and then pressing Windows-Key + P
• Choosing different booting options blindly with arrow-keys and enter