Now that you have it all cleaned up put some new arctic silver 5 paste and bend the X-clamps so there tighter and then put it together it should work fine, i am pretty sure it was just over heating and that is why it RROD. probably over heated and now just shows 3 RROD due to it hasn't reset the console yet. everytime i have a console that has rrod usually can be reset and takes you to the set up screen where it will tell you this console needs to be in a ventilated area etc etc ...
but try it and see might get lucky , like i said i have had alot of jaspers and havent seen one that has rrod , unless some one tried to take it apart or tried to mod or change something. and didn't get it back together the correct way
i got it from this lady i do hvac work for her son had it but went to ps3 after it rrod on them the son is only like 9 or something
plus when i took off the faceplate it had the sticker intact asked her where she got it from said brand new from walmart few yrs back
but yeah it had to be dirt and overheating i asked her where they had it she said on the carpet which we all know is a big no no
but after a mini quick reflow it booted right up and i did put some as5 running perfect i was just debating if i should attach the xclamp or do the fix
might do a complete mod on it rgh leds etc
thanks for the help rodent