All,

 I have a Tektronix TDS210 Oscilloscope that the backlight just went dark.
 I've tried changing the contrast, checking the CCFL tube, and associated
 wiring.  All looks and checks good.   My next thought was the CCFL
 inverter circuit.   I pulled the two multivibrator transistors and checked
 them and they appear okay.  I checked continuity of the inverter
 transformer and all looks good with it too.   I thought for sure it would
 be either the CCFL tube or the transistors.  Anybody have any ideas of
 what to look for next or in which direction to go from here?   A new P.S.
 board is available from Tek for about $100.00, so if I can't figure out
 something soon, I'll just order a new board.   But if I can get this one
 going, I'll have the scope back in service sooner.   If anyone has any
 ideas, I'd love to hear them.

                                             Thanks and Regards,

                                                    Jim

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