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I have an HP L1907 LCD monitor that flickers for about 10 seconds then the picture goes black. The power light is still on, but cannot get any picture. This happens whether it is attached to a computer or not. It just stopped working one day. I have seen some posts where there may be a bad capacitor, however, when I pulled it apart and looked at the PCB, I don't see any noticable signs of a bad cap. Do you have any suggestions? I love being a do-it-yourselfer and would love to troublshoot this as well, but not sure how to troubleshoot most of the electronics.

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  • Computers & ... Master
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The best thing to do is just replace the monitor, they are more to fix than just replace.

Posted on Apr 26, 2017

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: HP mx705 17 in.CRT Conventional Monitor vertical goes bad

it seems that youre monitor has a dry solder problem, try tapping it if the picture resumes to normal for a while than get it resoldered from a technician. if it soesnot solve problem than look out for a burnt resistance.

Posted on Jun 26, 2007

Coldcut
  • 1554 Answers

SOURCE: lcd 17"monitor phillips 170b4bb

that video input board will have to be replaced.
been there , done that.

Posted on Apr 25, 2008

  • 26 Answers

SOURCE: my monitor flickers then goes black

It could be the capacitors on your monitor's Power Supply. Open up the lcd and check the power supply board see if you see any "BULGED UP" capacitors. If thats the case you most likely just need to replace the bad capacitors. Go to radio shack or electronics supply store buy the same capacitors with the same mF and volts. If you can't find the same ones then always go with higher voltage. Replace the bad ones with new ones following this video. Make sure you note the negative terminals on the CAPS before you remove them. The shorter side on the new CAP is always negative.

Posted on May 03, 2009

micromend
  • 748 Answers

SOURCE: HP vs15 monitor Flickers then blacks out.

Hello

This monitor has 5 capacitors in the power supply that age prematurely. I can repair this for $50.00 +parts + shipping. Or you can take it to a local repairperson.

Posted on Jul 28, 2009

monkysee
  • 5 Answers

SOURCE: How do you take apart an HP w1907 monitor? I have

haha, been there. This ones a little tricky. Hope you have strong fingers. start by removing the base. There are 3 screws. First pull the base plate off. Then remove 2 screws. Next remove the little rubber insert in the center of the base bracket. You will need a long phillips to get to the 3rd screw. Slide out the base bracket. Flip the panel over and stare at the lcd with the buttons side on the top. Grab a small flat head screw driver. Look at an angle in each of the corners between the inner black lcd trim and the silver outside trim. There is a ****. Shove the flathead in there and pry outward toward the silver trim while lifting on the black inner trim vertically. The trick is to flex the black trim toward the silver and then pull up. There are 6 plastic snaps on the top and bottom, and 4 snaps on the left and right. If you've taken laptop screens apart, you'll feel the similarity.

Once you pry the black trim off the front. Disconnect the LCD Menu button assembly and power button. Then flip over the LCD and lift off the back shell. Looking at the back, remove the 2 connectors for the speakers. Use a small flathead to pry the 4 Inverter power connectors. These 4 connectors have a clip on them and are usually hard to pull out using the wire. Once thoses 6 connectors are removed, remove the 2 phillips screws holding the AC power plug to the case. Also remove the 4 3/16 posts for the VGA and DVI ports. Next remove 4 screws, 2 screws from each side of the LCD assembly. Hold the panel face down with the aluminum tape in the bottom left. Lift the shield and guide the 6 wires through the cage. While opening, look inside and disconnect the flat ribbon cable as soon as you can. Put the LCD to the side. Remove 2 screws from the Video processing board, and 5 screws from the power supply. Note: 1 of the 5 screws is longer. Rotate/slide the power PCB away from the cage to clear the speaker and AC plug, Then rotate towards the Video board. Disaconnect 1 plug. The OTHER plug is SOLDERED and must be disconnected from the video processing board.

There you have it. It stumped me for about a half hour. No pry marks. Barely noticed the 2 slits in between the trims. Well, good luck. Happy Soldering.

PS: I opened mine because I assumed it had bad capacitors. It only powers on for a short short period of time.

Posted on Nov 17, 2009

Testimonial: "The instructions were very clear and step by step. Once apart, I couldn't see any signs of bulging caps so I tried resoldering some of the connection"

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