reset motherboard on notebook

You will find more information about resetting Acer Bios here :
http://www.tech-faq.com/acer-bios-password.shtml

Maybe you should try to plug out the battery for longer.

there is a switch just over the keyboard (if i remember well)

you have to remove a plastic cover (might be snapped hard)

you will see a switch with at least 2-3 possible on/off (Actually 2-3 switchs)
you have to flip one, power on, then power off, and flip it to precedent state
i think it's the most right switch (can't remember it exactly)

I have tried to select and deselect all switches on/off; poweron/poweroff; cmos battery out for 20min!

Sorry,
I have posted 2 more posts to this problem.

https://www.experts-exchange.com/questions/23428573/monitor-out-of-frequency.html

https://www.experts-exchange.com/questions/23428995/notebook-black-screen-no-bios-startup-to-see-out-of-memory-message-on-external-monitor.html

Ok I have make this with the switches, but don't function!
I have tried again to connect the CRT monitor and the LCD monitor to the output VGA but nothing!

it's a monitor problem?

don't you have to install a software to manage the keyboard function to switch monitors?

the key should be FN with the little monitor drawing to switch monitor mode
but the managing soft must be installed (from original cd)

no
I have tried all this thinks before opening my laptop 100 of times!
I have tried all, but I think one possibility is here, I don't now what???

Sorrry for my english

THANKS