Computer not Powering up in Barford

Good afternoon, We are now with a customer on Verdon Place in Barford, We are here because the customers computer has not been powering up, We tested with a new power supply unit which was the same, So we opened up the machine and removed, Cleaned and reseated all the cards in this computer and managed to get it working, The computer then gave us a page fault so we removed Β and recreated the Pagefile and this solved the issue, it has been recommended to the customer to make sure all important data is backed up.