e3 flasher install now black screen

Hello, I'm new to this forum seemed best to post this here I'm quite new to playstations and have had nothing but trouble from the start, have flashed and modded plenty of xboxs Never seemed to get into this sorta trouble before. I did all the research I could do before the e3 flasher got to me and it seems I still made a mess of it e3 flasher installed on 3.70 ofw was under 3.55 before I updated, I know I'm stupid. So stupid.
I've had the ps3 appart 3 times now I can't see anything wrong with install, all I get now is black screen, before it was taken appart the second time it would say unable to read hdd when esata station switched off. Can't get recovery mode, this is driving me nuts
I did have a lot of trouble with the ribboon cable under the blu ray drive it is in , are those sorta cables easy damaged Help would be nice but not expected I know I'm a noob