Question about Dell UltraSharp 2001FP 20.1" LCD Monitor

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2001fp the screen is black the power light is green. It will flash when first turned on but wont light up. I have it apart and I don't see any obvious bad caps

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The problem can be in the inverter board: http://www.lcdrepair.us/2001FP-INVERTER.html

You can try replacing the inverter and hope that the problem is not in the backlight assemblies. You need the test lamps to verify the function of the inverter board. Do you get steady 20vdc feeding the inverter. You can also try heating up the two black electrolytic caps on the inverter board to see if the inverter will fire up using hair dryer, when bad caps with high ESR are heat up the ESR will go down.

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

Posted on Sep 12, 2010

  • 2 more comments 
  • mtnman47m Sep 12, 2010

    This is the inverter board that mine has. Do ya think those caps may be bad? they are not swelled up that i noticed.
    http://www.lcdrepair.us/2001FP-INVERTER2...

  • mtnman47m Sep 12, 2010

    Also I have 2 of these monitors with the exact same symtoms. I bought them from an auction allong with 4 1905fp monitors. The 1905fps' had 3 bad caps on the power supply board that were obviously swelled on the tops, quick easy cheap fix. All 4 had the exact same problem. I am in no way an electronics engineer and do not know how to actually test caps or any other componants, if they are not obviously bad, looking at them. I appreciate your feed back on this, its nice to know that there are people in this world that don't charge for shareing knowledge.

  • mtnman47m Sep 12, 2010

    UPDATE........DAAA make sure the power supply is adiquate. I just checked power supply out put it was only 12vdc requires 20vdc @ 4.9amps. works great with enough power (both of them) Thanks any way for the info.

  • Bud Martin
    Bud Martin Sep 12, 2010

    Glad you check the power supply voltage, 12v dc is fora 17" and smaller CLD backlight screen, 16~20vdc usually for 19~22" screen.
    Bad cap can look nprmal but can have high ESR, it takes only a few Ohms of ESR for the circuits not to work even though the cap value still read out OK.
    See exampe here:http://s807.photobucket.com/albums/yy352... FPD1830/

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