Question about HP L1955 19" LCD Monitor

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Hp L1955 LCD monitor

Monitor powers on, will blink an actual true display, then goes off and will not give another display unless the monitor cable is unplugged and plugged back in and then it only blinks the display and goes off again.


I can't seem to find any schematics for the power supply - which is my guess.

Posted by 4toine on

  • 1 more comment 
  • robobob Nov 18, 2007

    Any ideas where to order a replacement power supply for this? It's the actual circuit board, and would be cake to replace, so where in the world to order one?



  • bmkmelb Feb 11, 2008

    same issue, not too comfortable soldering on board

  • Alzahrani1 Jun 03, 2008

    Monitor powers on, will blink an actual true display, then goes off and will not give another display unless the monitor cable is unplugged and plugged back in and then it only blinks the display and goes off again.

    what can i do ???????

    Ahmed Alzahrani

    Clinicl Engineering

    National Guard Hospital

    Saudi Arabia

    [email protected]



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Check the capacitors on the power supply if any on the secondary side are bulged replace them all with low ESR substitutes. Panasonic FC work well.

Also check the transistors around the inverter output transformers there are two on each side. Check them with the diode function of your DMM if any measure shorted replace both in the pair. You can find these on e-bay.

That is a power board / inverter assembly getting it would be extremely hard not to mention expensive.

Posted on Nov 23, 2007


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