Question about HP L1906 19" LCD Monitor

1 Answer

I fixed my broken HP L1906! Couple new capacitors in power supply board and it could be powered up. Green led (for power) is on, monitor begin to circle 18 times - red, blue, green white horizontal stripes; all black; all grey; all white. Then led turned yellow and monitor turned black. Looks like problems with "main" board, but it has power 5V. May be somebody knows what does it mean all this firework?

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  • HP Master
  • 2,258 Answers

SCREEN DAY.
BUT NO PHOTO POSTED, worth 1000 words each,
can be lots of things ,
bad power supply, something shorted. caps but in backwards.
+ to + and - to - works only. or the short. every time.
there is no schematic,
leaving what?, guessing ? and buying used parts on ebay
expensive to do that.
i presume the OSD button is dead ,right?

the power button tells you its a hard failure, it did.

The L19xxxx has CCFL back lamps, most did.
so seems they work ok , to see color takes that working.
but power is first ,that mean not just 5v.

Posted on Jul 31, 2017

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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conniefisch
  • 58 Answers

SOURCE: my monitor is stuck in a constant color loop...

What you are seeing is a test they use at the factory. Here are the instructions to reset the monitor:

1. Press the MENU button
2. Use the + and - buttons to choose Advanced Menu
3. Press the SELECT button
4. Select Factory Reset
5. Select Yes
6. Press MENU again to remove the onscreen menu

Hope that helps :)

Posted on Dec 13, 2008

Matampong
  • 153 Answers

SOURCE: how to change the capacitor in the horizontal

If you know what is a flyback transformer in a CRT monitor, then you'll identify the horizontal section on the board. Refer to pics below for reference.
219d8f2.jpg


Posted on Jan 22, 2009

the logos1
  • 8 Answers

SOURCE: I have a hp compaq dc 7100, the power supply is

i prety sure there is no way to do that. you might be better off just going to fries or radio shack or some other electronics store and buying a new one, there is no way to change a 20 pin to a 24 pin srry the best pf luck to you. plus i trying to fix my own problem right now

Posted on Apr 01, 2009

  • 27 Answers

SOURCE: hp compaq dc 7100 psu 24 pin SLIM LINE

why wont you buy a new power supply or a plug that converts from a 20 pin to a 24 pin

Posted on Apr 22, 2009

  • 1 Answer

SOURCE: POWER SUPPLY 24 pin slim line colour code ,hp compaq dc 7100

normal white wire....?
white with red....?
brown....?

Posted on Aug 28, 2009

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HP L1906 picture does not re-appear immediatly, after being away from it for a while. The green light flashes for about 2 min before the screen re-appears.


It may have dying power supply due to bad DC filter caps just like the HP as shown in my albums.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, 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 monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Oct 23, 2010 | HP L1906 19" LCD Monitor

1 Answer

No power (led off)


Check the main AC fuse, DC filter caps (more likely to be the problem).
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Aug 27, 2010 | HP L1906 19" LCD Monitor

1 Answer

Monitor won't power on.


When you say that the monitor finally powered on, it's hard to tell if that means it came on and produced a picture. If it powered on and produced a picture, it's likely either a power supply problem (meaning a device inside the monitor called a power supply) or a physical connection problem (meaning the power's not making it from the cord to the monitor itself).

Often times the internal power supply feeds an internal motherboard which then regulates the power which lights the LED. Failure of the LED to come on typically suggests a problem with the internal power supply. And this is usually the result of one or more blown capacitors.

In your case this seems especially likely because capacitors, by definition, store a charge. When you left the monitor unplugged for a while, one or more "failing" capacitors likely discharged and, after being powered up for a while, took on enough of a replenished charge to do their job. Since they were already on the very edge of functionality, however, putting the monitor through this same set of stressors a second time probably killed them for good.

If you can SAFELY get into the monitor for a look at the power supply board, you'll likely identify one or more bulging capacitors (usually cylindrical capacitors that now have a convex head instead of a flat one). If you can SAFELY remove them and properly replace them according to their individual specs on capacitance and voltage, (being mindful also of polarity), you'll probably rescue your monitor.

If however, when your monitor finally powered up for the last time you failed to get a picture, this begins to suggest of failure at the motherboard level. In that case, you'd be best to look toward acquiring a new monitor since you'd spend nearly as much toward repairs on this one.

Good luck.

Feb 16, 2010 | Dell E207WFP LCD Monitor

1 Answer

HP L1906 lcd monitors won't display anything


Yes you got badcaps!!! www.badcaps.net examples of what they are and what they can do and this is one of them. U/You can change out these caps and see if it fires back up again.

Even bulging caps are still issues I just fixed a emac with bulging caps as the emac would freeze not when i put in the new caps the ****** is doing great!!!! I would suggest you do the same.

Jun 26, 2009 | HP L1906 19" LCD Monitor

3 Answers

No picture,led blinking yellow and blue


Its noting to do with capaitors the EEPROM has been corrupted not sure how this happens as the write protect for the eeprom is under the control of the cpu and not hard wired.
I have repaired three of these monitors all with the same fault no components were required just the eeprom re flashed.
The EEPROMs are very cheap so I will buy a few and pre programm them for others wishing to repair there own monitors.

Jul 27, 2008 | Hannstar I-Inc TW-191D Monitor

1 Answer

Screen going black, green LED staying on


Check to see if the image is Dimmed. Chances are the power supply on the FPD is either dead or not supplying power to the back lights.
Your problem is the power supply or the inverter on your board, you can replace it and it will be fixed.
Easy Fix REALLY EASY FIX
(inverter is what supplies power to your backlights. A lot of the times the reason a monitor goes black and the green power button is on, is because the backlights shut off. in most designs of the 1730 the inverter is embedded on the power supply. That is most often the case on this problem. Power supply/Inverter=Replace it and you will have a spanking new looking nice monitor working again. :)

Jun 19, 2008 | Gateway FPD 1730 17" Flat Panel LCD...

1 Answer

Veiwsonic 924x


This is a generic symptom that could happen to any LCD monitor.
The following is a generic answer applicable to most.

The most possible causes are bad capacitors or a bad semi-conductor.

Open the unit and check to see if any of the capacitors in the power supply or other boards look domed or vented on the top.

Replace any capacitors accordingly. Use the same value capacitors. Most often, 1000uF 16V or 25V, 470uF at 16 or 25V, 220uF at 16V or 25V.

If this doesn’t solve the problem, try checking the surface-mount transistors on the inverter board that run the lights. Some times these transistors go bad and can cause the power to cycle up and down. Check the area for any cracked or overheated ceramic or mylar capacitors.

Don’t forget to check for caps on the main board. Some times these boards are overly simple and only have a couple of caps, but other times they are teaming with them.

Dec 27, 2007 | ViewSonic VX924 19" LCD Monitor

6 Answers

Blinking Light


+++++++++++++++++++++++++++++++++++++++++++
This is the same problem with my 4 VG800 Monitors, you should be able to find the correct capacitor on your monitors by following the same procedure, I'm sure the boards are similar. Just get the correct value capacitor and try it in parallel with the initial filter capacitors right after the DC power in.
+++++++++++++++++++++++++++++++++++++++++++

Alright, I had 4 VG800 monitors with the exact same problem. The front led is blinky OR constant reddish/orangish OR picture is white with colored vertical lines OR no picture with whistling from the back of the monitor and backlights illuminated. All problems have the same solution. You need to disassemble the monitor (2 screws on the back, remove lower front button panel, remove 2 screws holding panel in and remove speakers, then remove panel and unplug speakers. Now remove lots of tape and screws from the cover in the center of the monitor). Now that you've exposed the amplifier board and the VGA to LVDS board, you want to look for the pair of 25V 100microfarad capacitors that are nearby the DC power in (they are right next to the black "100" inductor). Desolder the capacitor farthest from the DC jack and replace with an electrolytic with the same specifications. If you want to check that this is the correct solution please put the new capacitor (WATCH THE POLARITY) in parallel with the capacitor there want watch the front panel indicator go green and the monitor work properly.

I'll be posting and Instructable entry in the next few days on the process, watch for the username Waterppk on the website www.instructables.com

-Chris

Dec 11, 2006 | ViewSonic VX910 19" LCD Monitor

3 Answers

Stopped working suddenly after 18 months daily use


It appears either the inverter supply board or the main video board have failed. First replace the inverter board, if not fixed, replace the video board. Mike

Aug 09, 2006 | Acer AL1715 (Black, Silver) 17" LCD...

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