big block 750 issue

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MetalMofo

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Mar 16, 2009
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my buddy just picked up a 750 about 3 weeks ago(its the older rackmountable one without the passive/active switch). at first it took about 30min to warm up, now it doesn't warm up fully. the other day i opened it up to see if anything was abnormal while it started up...and the preamp tubes didn't even light up! is this a tube replacement? or??? i am probably gonna be phoning mesa boogie shortly here.
 
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