it's a tuff one mate and it's video related, got a box here that had it and it's been repaired and repaired and repaired, luckily 56 fans now keep it cool and fingers crossed it's still working...lol
As you can tell little annoyed at this box and didn't put any effort into it after the 30th E74 error i got.....
used heat gun and all the other tricks in the book to get it working from E74 luck, prob just a matter of time...lol