|This has got nothing to do with your motherboard bios, or your video bios version (which you can't change in most cases anyway).|
TV out is often turned off by default.
Check in your bios Setup pages - there may be a setting there to enable/disable TV out in this case since the video is integrated.
In Windows, check in your Display Properties - Settings - Advanced to see if there is a setting for TV out, and if there is, turn it on - e.g. for a ATI adapter, that's under Displays.
If there is no TV out, that doesn't necessarily mean you don't have it - if Windows already has drivers it often does not install advanced features of video cards or chipsets, or doesn't install them properly (e.g. this is certainly true for ATI cards).
If you found no TV out setting..........
Check out the Acer site using your exact, specific model number, not just the general model number, find the exact specs.
If you are sure you have it, get the manufacturer's drivers - they will install all the abilities your video is capable of supporting.
Go to the downloads page here.
Get the Intel Chipset Software Installation Utility, and the graphics drivers.
Install the Intel Chipset Software Installation Utility.
All this does is make sure Windows handles your chipsets properly, and it will often do that better than Windows does on its own.
Of the ones listed only the first one is applicable to your laptop - the second one is for developers - all the rest of them don't cover support for your chipset.
Install the graphics drivers - follow installation directions - you may have to unistall entries for the drivers / software in Add/Remove Programs, etc.
If you have the TV out capability, it will then appear in Display Properties - Settings - Advanced.