Question about HP L1706 17" LCD Monitor

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I have come across an HP L1706 17" LCD monitor. The unit powers on, had a constant power LED light yet only displays backlighting for a few seconds before the CCFL's switch off. I've done the flashlight test and the image from the PC is still showing, just not being backlit. Every time I turn it on, it does the same thing. I've already opened the case and checked for blown Caps, none seem to be puffy or enlarged at all. There are also no loose solder points on the underside of the inverter board. Any sugestions? Perhaps where I can get a replacement inverter board for this model? Thanks, Saint Inix

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The problem is a back light fault and is caused by either a faulty inverter board or a faulty CCFL lamp.
You can source parts from the Internet. Try these WEB sites :-
Normal 0

www.lcdparts.net

http://www.nylaptopparts.com/

http://www.ccflwarehouse.com/

Posted on Oct 03, 2010

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Sanyo DP46142 TV comes on for approximately 30 seconds and then screen goes black. Power LED stays on.


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Unsupported Display Mode A video card has the ability to send output to the monitor at many display resolutions and refresh rates. However, no single monitor is capable of supporting every possible display mode. When the video card sends an unsupported display mode to the monitor, the monitor shuts off to prevent damage and blinks, or displays an error message. Standby Mode b> When a monitor detects no video signal from the computer, it assumes that you have turned the computer off and enters standby mode to reduce power consumption. Dell and HP monitors display an amber light when in standby mode. The status light on an Apple monitor blinks slowly. Incorrect Power Supply Some monitors such as certain Apple Cinema and Studio displays use external power adapters. Because different power adapters may have similar connectors, these monitors are designed to detect when an incorrect power supply is connected and blink the status LED rather than attempting to turn on. In the case of an Apple display, the LED blinks in an alternating short and long pattern. b> Backlight Failure b> A flat panel LCD display has an LED or fluorescent backlight that illuminates the pixels and makes it possible to see the contents of the screen. If the backlight fails and requires replacement, the monitor is unable to display any information. In some cases, you may be able to resolve this issue by turning the monitor and computer off, disconnecting and reseating all cables. If the monitor still has a backlight issue, it requires professional service.

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First use an external light sorce like a LED flash light. With it close to the screen do you see a light ghosty image of the desktop?

If you do then either your backlight's or backlight power circuit have failed. If the monitor is not under waranty some repair shops may be able to fix the problem.

If there is no image then the LCD is not conecting to the main board and the monitor will need to be replaced.

If you want futher details on the first instance contact me

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My hp dv600 when powered up looks normal but if i give it a few seconds the screen goes black and wont come back i shined a light and i do have picture but no light maybe ballast?


alejandro,

An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp.
Very similar to the Fluorescent lamps, (Bulbs), used in homes and businesses, but on a MUCH smaller scale.

HP Pavilion dv6000z series Notebook PC, is a general series designation. The EXACT model number is on the bottom of the laptop in a white Service Tag.

The HP Pavilion dv6000z series of Notebook PC's used either an LED or CCFL type of Backlighting.
Depends on which model it is.

http://www.screentekinc.com/backlight-ccfl-led-explained.shtml

As stated in the above information a Backlight is mounted in the back, or on the side of the LCD screen.
The LCD screen is composed of layers. These layers are held together by a metal frame which emulates a picture frame. If the Backlight is a side unit it will be held in place next to the layers, and inside the metal frame.

[Which means the LCD screen's metal frame, (LCD Panel Frame), needs to be opened on one side.
This will leave the layers which compose the LCD screen loose. The layers MUST be held in the proper placing when changing out the Backlight. Not an easy job to accomplish]

An Inverter is used to change the power coming from the laptop, to be used by the LCD screen, and Backlight.
90 percent of the time the problem is the Inverter.

The Inverter for the Pavilion dv6000z series of Notebook PC's is located inside the Display Assembly.

The Display Assembly is the
1) Display Enclosure Cover, (Plastic top of laptop),
2) LCD screen,
3) LCD Panel Frame, (Metal frame around LCD screen),
4) Display Bezel, (Thin plastic frame which surrounds the LCD screen in the front)
5) Camera Module
6) Inverter
7) Display Enclosure Cover Hinges (2)
8) Display Enclosure Cover Hinge Covers (2)
9) Wireless Antenna Transceivers and Antenna Cables
10) Microphone receivers and cables
11) Various mounting screws

[The Top Cover for a Pavilion dv6000z series Notebook PC is essentially the Palm Rest. The cover under the Keyboard]

With the Display Bezel removed the Inverter is located at the bottom.
(Display Assembly removed from laptop first)

HP Support > Pavilion dv6000z Notebook PC series> Manuals>Service Manual>

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&lang=en&product=3224052&

One example of an Inverter for an HP Pavilion dv6000z series Notebook PC,

http://www.amazon.com/DV6000-DV9000-V6000-INVERTER-AS0231721C1/dp/B00480MXUS

Please post additional questions in a Comment.
Regards,
joecoolvette

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Check out
www.lcdparts.net

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Monitor going black after a few seconds can be causd by a faulty power supply or inverter. Some monitors have both as one unit.
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The average monitor from 17 to 20 and sometimes the 22s have usually 4 bulbs in them. One bad bulb will also cause the inverter to not fire up.
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ebays bammbammfran

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