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Diodes on ballast board for 52HM84 Toshiba DLP?

My set has the symptoms that point to the lamp being bad. Changed the ballast board and lamp with no change in symptoms. Replaced R3 on original board (found to be open) and read open on diodes CR1 (marked as GV265), D5 and D6 (both marked as 66C). Does anyone know the specs on these diodes.

Lou
January 2010
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Mend Video, Televisions
Mend repair fix Toshiba televisions