i have a problem with version 10 mobo # GH-026. it was working fine and i tried re soldering focusing coils onto a burnt out laser. the replacement laser is a 400b and the original laser is a 400c . it is deffinatly acting like a blown fuse because the second i tried the "new" laser it immidiatly stopped spinning with any laser installed.im not sure if its the 400c vs 400b or a botched soldering job and it doesnt really matter ill chuck the bad laser never to be used again. right now the symptoms are as follows. absolutly no spin. (motor and laser are both new and 100%) when i start the machine it does not recgnize a disc at all. it just flashes it is reading then stops and says "no data" its not a DRE if anyone would be kind enough to link me to a place to buy the replacement fuse and a way to check these. i actually have 3 different mobs's im working with and all 3 have the same symptoms. is this a BA/LA chip? a fuse? something else? how do i check?