I've got a backward compatible PS3 model: CECHE01 it beeps thee times during startup then the red light flashes. A while back the YLOD repair was done on it and this kept the issue at bay. Some sources suggested that it could be a hard drive issue. A known working hard drive was tested in the machine to no avail. I also have a non-backward compatible PS3 model: CECHK01 while this one works fine (or seems to) it's not backward comp. and that's the feature that I'm really looking to save here. TL;DR - Will a motherboard from a CECHK01 work in a CECHE01? I could dissect both systems to visually inspect but that's an insane amount of screws if it doesn't work.