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Replaced HV CB and still a problem

I have replaced the defective HV CB and now I get a normal display for about 5 seconds and it goes off with solid green power lite lit. Power holds good at 12 volts. Any suggestions? Gary

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SOURCE: LCD17 Flat panel

Check this link; They sell it for $69.99 and also list other alternative part numbers / manufacturers. Hope this helps, please ask again if you need more options :)

Posted on Sep 17, 2007

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Screen goes blank after being on several seconds

Is the green light on (still indicationg power? Ist put your ear to it and switch on - hear any buzzing? Most like the HV Fluro Inverter for the lamps has an issue. For some the 2SC5707 may have gone - common.

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Display goes black after 5 minutes

Repairing the DELL E171Fpc LCD Monitor with the complaint of display shutdown after few seconds (power LED still on) was not difficult. Normally when this type of problem happens, we would first suspect the inverter board, then the filter capacitors and lastly the main board. A defective in one of the lamps and a faulty TL1451AC PWM IC or inverter ic may caused the display to shutdown as well. If the lamp is defective, it will send a feedback to pin 3 or 14 of TL1451AC IC and caused it to stop producing output signal thus the display just shut off once you switch it on.

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