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Backlight fails after 2 mins on Sony Viao laptop. Is there a common fault? where can i source spares?

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On dissasembly of the unit, having removed the mains lead from the unit and dropping out the battery, there are very few parts, just the backlight tubes which run around the periphery of the screen and a narrow Pcb at the base of the screen which is the invertor (takes a low input voltage and provides 600volts+ to drive the tube.) I obtained a replacement Invertor which resolved the fault ( cost of repair £50 and 15 minutes work.)

Take great care to ensure both the battery and the mains lead are removed pior to opening the unit as voltages around these components are in the order of 600volts when in a powered state..

Posted on Aug 13, 2008

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