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NEC Multisync 1770gx lcd monitor goes blank when I move the unit

\015 I have a NEC Multisync 1770gx lcd monitor with a weird problem.I turn it on and after 5 minutes the display goes black ONLY AFTER I MOVE the monitor,I bearly can see the display I have to take the monitor to the light to be able to see anything.I already replaced some capacitors from the inverter board but still have the same problem.thanks\015

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