The major vendors like Mouser and Digikey don't seem to stock TV repair type semiconductors. The Sanyo Stk modules are widely counterfeitted, which makes the problem even worse.
It was really a lot of work to get the old ICs out and the new ones in. I suspect the replacements I put in 4 years ago were also counterfeit, but at least those ones worked for 4 years! Thank goodness I got the old ones back in and it works again, I was getting nervous I had done something wrong and ruined my projector.
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