Possibly of interest, the 2008Z chip is an extension of the 2003/2005 chip series in the older L&C power supplies. I have a Raptor brand 400 watt psu which is a L&C OEM, model number LC-B400ATX, circuit board marked X2005B, ATX ver 1.2. Interesting thing is that the silkscreen printing on the component side indicates that the pwm chip can be either a 16 pin or a 20 pin chip. The Raptor has the 16 pin 2005 chip installed.

I did some experimenting on my LC8460BTX and removed the 2008Z chip and installed a 2003 chip. It worked. So it appears that the 2003 and 2005 chips are interchangeable, and the 2003/2005 can be installed where a 2008Z was.

The extra 4 pins on the 2008Z are for overcurrent protection for two 12 volt rails, the 5 volt rail, and the negative rails. So putting a 2003/2005 chip in its place removes the overcurrent protection for the power supply. Bet they charged lots of extra $ for that feature!




This unit does actually have 2 12v rails. It might be sensitive to having no load on 1 12v rail and even a light load on the other 12v. Also check the 5v and 3.3v and make sure they aren't getting up there too high due to a crossloading situation, especially when you have almost no load on them.