Hello and many thanks for viewing this,Today I am repairing a HP Pavilion laptop GPU with the reflow technique,which I learned from this site(God I love this website)and while installing the OS found that the keyboard was not working. So after trying several (many many) times to reattach the ribbon,I did manage to get [FF]..but have not gotten it to work since,I have blown out the ribbon connection with compressed air and then lightly swabbed both ribbon end and connecter with Isopropaphol and when neither had any effect gave both a quick swab with WD40. I believe the ribbon is as far as it will go into the connection,any tips advice would be very very welcome thanks again.