QUOTE(Hardcore Gamer @ Feb 4 2010, 12:14 PM)
I fixed an 020 xbox last year by loosening the heatsink, I posted in this thread how I fixed it around March.
I don't have that xbox now but got another one yesterday that had a e74 error, after I messed about, the e74 error screen was replaced with a black screen with vertical dotted lines, the lad who owned it had done a lot of towel tricking to it so it's had some abuse. I heated it to get the 3 red rings and it gave me the 020 error afterwards.
I took it apart and seen that it had already been x-clamp fixed but the nuts were so tight it was hard to even turn them with a spanner. I slackened them off, turned them back finger tight and it burst into life. That's the second 020 error xbox I've had that I've fixed by loosening the heatsink, they mustn't like being super tight.
0020 did the heat sink fix, vidio said tighen them down good, 3 lights, pdf said try to tighen them more, 3 lights, tried not so tight, 3 red, read your post, what the hell, loosen them suckers up ....green...