Ok i have changed psu and the c807 cap still have the same problem also tried a different security chip, didnt have much look with a blower!

i have took the board out and had a good look on both sides and noticed this marked by the arrows should there be solder there???

[img]https://mega.nz/#!H99h0RAI!4oQABPE9nEPR5EbgWVarmeds1notcH2goTtDmL7qSO8[/img]