Acer Aspire One Netbook not switching on plz help

Hi
I have read alot of threads already on this problem but i'm still stuck.

I have an AOA150 acer aspire one running on XP and its out of warranty.

When plugged in an orange light shows but won't switch on, i have brought a new lead but no difference, i don't think its the battery as it still won't power on with the battery out. Occasionally when i mess around with the battery the screen may flick on for a second or when i hold the power button for a couple of minutes to drain all the power the screen flicks up again with the acer screen for about a second. Sometimes when i leave the lead plugged in for a couple of hours the light turns green but still doesn't do anything. I can't here any fans or anything running at all and when its plugged in and without battery in it makes a clicking.

I've also tried that bios update instructions with a usb stick by putting the flashit file and renaming that fb file but doesn't seem to do anything. I have only copied those 2 files to the usb and not copied any of the other files though. Am i doing that right?

And finally i have spoke to acer but they want me to send it in for £36+ posatge to have a look and then price up repairing it.

Anyone help as i don't want acer to charge me for sending it in if its going to be too expensive to reapair.

Thanks

Stephen