Question about HP L1955 19" LCD Monitor

1 Answer

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 on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers
Re: Hp L1955 LCD monitor

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

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

How do i the USB drive to work an my 1955 monitor

There is a cable that will go from you monitor to your computer.
Once you find it and plug it in your usb will work.

Jul 02, 2011 | HP L1955 19" LCD Monitor

1 Answer


if there is no power getting to the monitor ( indicator light ), test the fuse in the power lead first.Ensure it is inserted tightly.
If there is power to the monitor, the green indicator light should be steady, if it is flashing there is a problem with the display

Test the monitor in another computer or laptop.

If t stays black , I'd supect a faulty backlight or more probably a blown power capacitor whih will need checking and replacing

Dec 30, 2010 | HP L1955 19" LCD Monitor

1 Answer

My HP Monitor Model No: L1706 problem

I sure sounds like you have backlight problem, since when the VGA cable is connected the power LED turns GREEN and blinks when VGA cable is disconnected, it means the video signal is getting to the monitor OK, so more likely the problem will be in the monitor, but just to be sure, you should also try this monitor with another PC first.
Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed HP and other monitors to get some ideas what goes wrong:
Post back what you see inside so we can guide you further.

Apr 01, 2010 | HP L1706 17" LCD Monitor

2 Answers

I have several HP L1955 and L1925 monitors do not show image

michael_b173, You will need to do some extensive reading in my fixya profile and pay a visit to the following web site: ALL "cold-cathode-fluorescent-lamp" back-lit LCD monitors are the same in their basic design and operation!!!! Follow the other links you find in my fixya profile responses to other "black" or "blank n black" screen lcd monitor owners to make decision if DIY repair is option for you. Two other fixya lcd monitor tech's (buddymc and budmrtn) are also helpful. Read their stuff also!!! They also have "how-to" and lots of photos of what to look for inside monitors.
Good luck with the repairs. 12fixlouie

Mar 25, 2010 | HP L1955 19" LCD Monitor

1 Answer

No display, changed monitor and have display. Need to find replacemnt part number for problem.

Look on the power section for bad caps with bulging tops, common problems on ALL brands of monitors, see some examples of bad caps and monitors here:

Jan 06, 2010 | HP L1955 19" LCD Monitor

1 Answer

No display at all

You may need a new video card.

Jun 25, 2009 | HP L1955 19" LCD Monitor

1 Answer

Issue with 20" WideScreen Monitor

I think you are having trouble with the plug the cable connects to.

Jul 09, 2008 | HP L1955 19" LCD Monitor

Not finding what you are looking for?
HP L1955 19" LCD Monitor Logo

Related Topics:

1,338 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Computer Monitors Experts

Ivan Bernal

Level 1 Expert

8 Answers

Tony Isted

Level 1 Expert

49 Answers

Elizabeth Mescall

Level 1 Expert

7 Answers

Are you a HP Computer Monitor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides