Hi an 840 thats been tweaked at 150 watts max.(why i dont no 100 WHATS IS USUALY GOOD ENOUGH.) i have located the fault and i believe the psu been put under strain, looking by the way the bios resistor looks more scorched than usual ie the radio output is ok but gets to a sertain temp and breaks down pwr down to zero and radio locks out any views on this?please'' has any one come across this prob in the 840...?