philips plasma fd9944/01s?

followed advice on these pages heating the three caps and the tv worked fine
now decided to actually replace the 3 caps
could only get 1000 microfarad in 35 volt form
now tv starts straight away but picture seems to pulse
(ie goes bright then dull every second)
could it be this diferrent voltage on capacitor or maybe i havnt soldered all tree correctly(the 100 microfarads are correct at 25volts) please help me