ACER does not have the best rep.
I saw one of these on Ebay on the same coditon as yours trying to be sold 75 $
Now you go to board or chip or ram
Think is it cheeper to buy/ build a whole new system and are any of the parts in this system worth salavaging.
Salvage list: Hard drive
card reader
Optical drive
Vidio card
Case( maybe)
You have to buy or find borrow from frends parts to swap in and out to find the problem. Boards /cpu /ram
Look on places like KIJIJI or Used (your cittty) you can probaly find a cheep good or bettter computer that will fit your need or one that only neeeds a few things to become realy good.
I think Its time to buy a new good coputer if you can get the mony togetther, :biggrin: