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LCD Backlight/Inverter Board problem


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rickz8

rickz8

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Hi All,

Sony Vaio Laptop VGN-BX570B 17"

I've been tolerating a flickering LCD for some time. Usual remedy was to pull the screen/cover closed and open again, back and forth, until this method stopped working and left me with a blank screen (I can still see the desktop but it's very dim). Everything works fine when hooked to an external monitor.
I tore down the LCD and located the dual bulb backlight. At least one wire (possibly both) on the low power side were arcing. Ordered new bulbs, had the wires soldered back on and went home to test. Before installing back into the LCD and the LCD back into the laptop, I pugged in the bulbs to test. Only one of two bulbs lit initially, and only about half the bulb. Some buzzing noise, then it goes out.
Being optimistic, I hoped if I installed them back into the LCD and attached the cables that this might make the difference. Same issue. So my question is:
Is there a way to test for a bad inverter board, other than just replacing it and hoping for the best?
I'm having a hard time located one...printed on the board is NEC/TOKIN D2028-B011-P2-0 this appears to be THE unit:
http://pchub.com/uph...D-Inverter.html
Any help or suggestions is greatly appreciated.
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