|The old PSU was smelling and finnaly refused to work at all.|
The HDD is on a shared IDE with the DVD, but I have changed this ribbon with no improvement. Also the Floppy drive refuses to work when it's own IDE cable is attached. One other sympton is the PC powers up immediately when the mains is connected, ( I don't have to press the front panel button to power up). There is no way of turning off unless I turn off from the wall socket, even if I hold the panel switch in for 5 seconds, Do you think the MOBO or CPU need replacement?