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There appears to be a problem with the printed circuit board on these machines. A possible fix is to remove the back cover then loosen the 4 screws holding the printed curcuit board.
probably the amp section- I am working on a STVG-700 right now, the audio amp is mounted on the lowest circuit board in the case, includes the power supply except for the transformer. There are fuses mounted on this board, with luck that's all that blew on this. I know this problem is months old, but if you're like me and didn't get it fixed quickly, it's still sitting around somewhere...
sounds like the rom drive needs to be cleaned had a similar problem with a kareokee machine when i was 16 used electrical contact cleaner and some cotton swabs with a cleaning disc and it worked fine
These are a pain in the **** to service. I have a -700 in the shop right now I'm working on, the drive tray was jammed, so I freed it up (trial and error), and while I didn't notice the first time I checked, the flat-film ribbon cable that plugs into the optical (read) head had gotten some of the conductive traces scraped off. I took a cable from a working unit, installed it, tweaked the laser drive just a bit, and now the drive reads track 0 (with the track info). What I haven't yet figured out yet is why none of the CD controls work (>, <, <<, >>, ||, etc.). This isn't terribly advanced service, but it's beyond beginner level.
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