first thing is to check the power supply you can use a volt/ohm meter or a power supply tester. I like the power supply testers myself.

it doesn't matter that its universal, you don't have the correct volts or amps.

well thats hard to say.
you have an under powered power supply
you have no ram and you have no keyboard

the only way to find out for sure is either take it in to a repair shop or buy the...

yes it needs to have ram installed. without ram installed the only thing that will happen is that the fans will turn on and thats it.

it will not go through POST
it will not beep
it wont do...

no ram = no boot

you have to have ram installed for it to boot

No I am absolutely serious. BIOS is needed to start the computer and if the update was interupted or failed or if the BIOS was updated with the wrong version it is possible that you wont be able to...

I personally haven't had a failed BIOS update but I have read that If a BIOS update fails that the motherboard could be rendered useless and therefore you will need a new motherboard.