|When you power up - is there "any" sign of activity at all from the laptop; fans, hard drive activity (vibrations from it spinning up) etc.?|
Can you recall anything odd/unusual the last time it worked OK?
Not at all sure where you got the alt + F10 combination from; not one of Acer's standard combinations...?
Alt + F5 is the standard Acer combination to toggle from the built in display, to the vga o/p, and then to both at the same time.. Perhaps you might try that combination and see if anything displays? Try it after you feel/think the system may at least have booted up - even though you can't see anything...
Download and burn to a dvd a linux variant ISO. Ubuntu.com is where to get one for ubuntu (free). Boot with that dvd. If it works Boots into a linux desktop) then at least it indicates the hardware (motherboard included) is likely OK.
Ubuntu will load into RAM only; and if it manages that then you ought to be able to access the hard drive and at least access/save your files to external storage. Once that is achieved you can more safely start to troubleshoot a little more easily; knowing your personal files are safe elsewhere.