Well I bought a couple of systems off ebay to fix for my mates.
I fixed this particular xbox which wasn't putting out any video (no error code, just no video!) with an x clamp fix (RBJ MKIII method) and it worked perfectly!
Then I found out he wanted a VGA port to hook it up to his comp monitor. doh. SO i went about putting that in and again did so successfully. The only problem was, was that the colour was really washed out. I thought this was due to some faulty solder so i took out the mobo which of course involves taking off the heatsinks and ever since putting it all back together i have been receiving error code 0020!!!!! arrgghhh.
I have played around with the bolt tension - nothing.
replaced the thermal paste with the new MX-2 compound - nothing.
Ran without fans to overheat - nothing.
Anyone out there?
P.S- when i got the xbox there was no thermal pads on the bottom ram. could this be the source of the problem? anyone know where to get some of these in AUS?
thanks any help you can give.
Dylan

You could just get the Xecuter ROD kit it consists out of 4 pads and 2 screwdrivers
I guess 0020 means that 2 solderballs are shorting out. It can be caused when you put too much pressure on the GPU. I also had an xbox that some retard heatgunned previously and he flattened all the solderballs under the bottom RAM...
Just loosen the screws a bit and try again.
Getting a professional reflow is the most permanent fix though...