Question about HP Pavilion DV9727CL Notebook

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Hp dv9727cl laptop screen goes blank after a few min. How to check if mono,graphics, or inverter prob.

Laptop screen displayed all kinds of colors,and i was told that the screen needs to be changed. I replaced the complete screen and frame assembly and now the screen comes on for a few minutes and then goes off. If I cold boot the laptop again, the screen stays on a few minutes and goes off. It goes ff each time displaying for less time until it does not display anymore until I discharge all power and start again from cold boot. Could it be the inertia, graphics chip, or motherboard that is the culprit. Thanx

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Format your system

Posted on Dec 11, 2012


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6ya staff

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Posted on Jan 02, 2017


Umair S

  • 55 Answers

SOURCE: HP Pavillion DV2000 (dv2415)laptop w

We can troubleshoot the Overheat issue but first we need to turn it on. Perform following steps and check if you can see the diplay on screen.

1. Disconnect the AC Adapter.
2. Remove the Battery.
3. Hold the Power button down for 30 seconds to 1 minute.
4. Reconnect the AC adapter and do NOT connect the battery now.
5. Turn on the Notebook power.

If the Notebook power up and shows you display, then proceed with further steps (or you can connect a desktop monitor to check if its displaying. Press Fn+F4 to toggle the display on external monitor)

The notebook may overheat and make noise or stop working due to the following conditions:
1. Due to incorrect power supply from the AC adapter.
2. If the Fans/Heat Sink are not working properly.
3. If the power management and BIOS settings are messed up in the Notebook.
4. Finally due to other components on the system board.

To resolve this problem with overheating, perform following steps.

I check your Laptop and see that your Laptop product number is "GA534UA#ABA" with Windows® Vista Home Premium pre-installed, if you are using the same, process with following steps.

Step 1: Reset the BIOS to factory defaults:
1. Click Start, Turn Off Computer, Restart.
2. When the HP logo appears, press F10 to enter BIOS Setup.
3. Press F9 when you are in BIOS Utility to load the BIOS to default. Click YES. Then press F10 to Save & Exit.

Step 2:Re-install Power Management in Vista
1. Press Windows key + R
2. Type devmgmt.msc and press enter.
3. Click the plus (+) sign next to System Devices.
4. Right-click the ACPI Fixed Features button and select Uninstall.
5. Restart the system.
On restarting the system, Windows will automatically detect and install Power Management on the computer.

Step 3: Installing an update for BIOS:
Caution: Install this BIOS only if you are using pre-installed operating system with above mentioned Product number.

WinFlash for HP Notebook System BIOS (for Notebooks with AMD Processors):

Step 4: AirVent cleaning:
Reducing Heat and Fan Noise by Cleaning Air Vents:

In case there is no display, remove and reseat the Hard Disk and RAM and check for the issue. If display comes up after removing and reseating the RAM and HDD, then you need to follow the above steps again.

Service Manual to remove reseat HDD and RAM:
Memory Module Page: 127 of 310
NOTE: If you have more than one memory module, you should test them individually to determine if one or both of them are faulty. Insert each module separately, then turn on the notebook to determine if the inserted module is working. Once you have determined which memory module is faulty, you can replace the faulty module and reseat the working module.

Hard Disk Page: 121 of 310

Contact HP at for further assistance.

Posted on Aug 22, 2010

William Alequin

  • 931 Answers

SOURCE: HP Pavillion dv2500 laptop will not boot up.

Pressing the f8 key doesn't work either? This should boot the laptop to safe mode, if it doesn't then check the memory cards before you do anything else, try to get somebody with the same type of memory card to lend it to you. If that doesn't work, then your HDD is corrupted, and to re-install Windows.

Posted on Sep 05, 2009


Chuck Gluth

  • 90 Answers

SOURCE: compaq laptop display not working

Have you tried an external monitor? Plug one in while the laptop is off, then turn it on. If no video on the external monitor, then there's a hardware issue somewhere else. Such as ram, motherboard or possibly cpu.

Posted on Oct 26, 2007


  • 788 Answers

SOURCE: HP laptop display issue

If you are recving 1 long and two short beeps, it is not a memory problem.
It is not a Lid closing or lid switch problem.
If you are able to switch to and from your LCD and Monitor, you are lucky.
I have been up and down the road with several HP DV6000 series units, all have had the 1 long and 2 shot beeps.
HP is aware of this problem and has offered an extended 1 year from date of original warranty expiration. Another words 2 years from date of purchase. HP will ask for $365.00 + or - ? for this repair.
Their repair consists of a motherboard replacement.

If you go to HP's web site, you can look up your model and if in warranty, have it sent back for repair.
The problem will not get better in time but only worsen. The heat sink on the dual core units is not handling the heat transfer properly.
The board is a 2 sided wafer which has displayed failure in several places, due to the heat load and transfer design. Area of problem is directly under NVIDIA chip look for craters. Theses are solder points the size of a pins head which because of the heat and the stress of the transfer bracket above, have separated making in some cases an intermittent connection to chip.
The best thing to do is have a technician remove the board from inspection and blow out the heat sink and surrounding areas.
Apply new heat sink tape and grease where needed and re-assemble.

You must update your BIOS ver. to current.
This new version will address the Voltage and Fan Control Speeds in a better manor.
If your unit is just now giving you these errors, now is the time to act.
Just like in a A/C unit at home, a restricted air flow will make unit run longer and hotter.
Their are no filters here, once lint and dust have collected in the coils, it is just a matter of time.
Hope this helps you in your problems.
Anybody reading this note having a DV6000 series unit, should check at their web site for warranty and call back issues.
[email protected]
P.S. if you are a technician and feel you want to repair the board yourself, drop me an email with the model number and I will explain in more detail.

Posted on Jun 11, 2009


  • 1 Answer

SOURCE: hp dv6000 laptop beeps 4 times n won't display on start up

I had the same problem, i found it was because my RAM stick was installed loose. I removed and fixed it again properly.
Issue was sorted.

Posted on Mar 29, 2010

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Related Questions:

1 Answer

How do I replace the entire screen assembly on my dell latitude d600 laptop?

Basically you need to remove the hinges that attach the screen to the bottom of the laptop.
For instructions refer to these WEB sites.
Replacing a hinge, or both of them, isn't very tough. Replacing Display hinges

Feb 03, 2013 | Dell Latitude D600 Notebook

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No display on laptop

Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

Apr 29, 2012 | Computers & Internet

1 Answer

Change back light in dell laptop

I'm going to go with the heading above; Dell Inspiron 6000 series of Notebook PC,

1) Remove ALL power to the laptop. Remove the AC adapter (Charger) and Battery.

2) Never hurts to wear an ESD wrist strap, and have it's alligator clip connected to a good ground.
Average cost is around $3 to $6.

3) Use a multi-compartment container for the various screws you will remove.
Label each compartment for the area the screw/s come out of.

SOME screws look VERY similar to other screws.
DO NOT mix them up.

4) Make a record as you disassemble. Make notes and drawings, and/or use a digital camera, or video camera. (And good lighting)

Nice to have a record you can refer back to in case you are interrupted, nice to have for your first time at this, and nice to have a Personal record, along with the Service Manual.

(One example;
The Wireless Antenna is in the Display Assembly.

It has wires that lead from it, go through the bottom of the Display Assembly, and into the laptop body.
They then thread through the laptop body, and down to connect to a Wireless Module.

You HAVE to route the wires back through the same channels, and latches, as they were originally.

If not the laptop will not fit back together correctly, and damage may result to the wires.

The two wires going to the Wireless Module are Black, and White.
They MUST be reconnected back to the correct terminals, on the Wireless Module )

5) In the Service Manual's list, click on - Display Assembly and Display Latch

You DO NOT have to remove the Keyboard all the way, in order to remove the Display Assembly.

Just roll the Keyboard over, and lay it down on the Palm Rest. (Cover)

The Keyboard Cable is a FFC. Flat Flex Cable.
The connector on the motherboard for the Keyboard Cable is a type of ZIF connector.
Zero Insertion Force.

IF, you must remove the Keyboard, post back here first.
There is a proper procedure, and safety guidelines I will post.

The motherboard connector is made of plastic, and IF broken, you may be looking at motherboard replacement.

Now, remove the actual Backlight, and replace it.

An LCD screen does not produce light. It needs an additional light source.
A Backlight is the aqdditional light source.

A Backlight can be a CCFL, or a series of LED lights. (Both are present technology used today)

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

{Average size is 2mm Thick, and Length is almost the height of the LCD screen.
2mm is a little thicker than 1/16th of an Inch.
(.0625 = 1/16th
.0787 = 2mm }

A screen Inverter is used to convert the power from the laptop, for the Backlight, and LCD screen.

90 PERCENT OF THE TIME the fault is a bad Inverter

(A screen Inverter is MATCHED to the LCD screen. They ARE a matched unit. If replacing make SURE you get the correct one.

Use the manufacturer identification code on the Inverter, or check against the manufacturer code on the back of the LCD screen )

An LCD screen is actually an assembly. It is composed of layers.

These layers are held in a specific position by a Screen Frame.
A metal frame that surrounds the LCD screen layers. Resembles a picture frame made of thin metal.

There are two styles of Screen Frames that I am aware of, as far as how they disassemble;

A) One style has the frame in four parts. Top, Bottom, and two Sides.
Countersunk head screws hold the frame together.
The Hinges must be removed first.

Care must be taken to locate THE screws which are for just the Hinges, and NOT the screen frame.
You Do Not want to completely take the Screen Frame apart.

Reasoning is;
1) NOT in all cases, but in most, the CCFL is on one side of the LCD screen assembly.
Usually the right side as you face the LCD screen. (Still mounted in laptop)

Only the side 'rail' of the Screen Frame is removed, that is on the same side as the CCFL, to access it.

2) If you completely disassemble the entire LCD Screen Frame, the LCD screen layers will be able to move around. If they aren't aligned properly the LCD screen will not work correctly.

It is for this reason the one side 'rail' is removed CAREFULLY, and the the old CCFL is carefully removed, and new one installed.

[ CCFL can be anywhere however. Top, Bottom, or Side. It is up to the LCD screen manufacturer ]

B) The second style is composed of two halves. Crude comparison would be two rectangular cake pans, with no center.
One is smaller, and fits inside the other one.

LCD screen layers are kept in 'bottom half'. Top half is removed. CCFL is eased out, and new one eased in.

Dell Inspiron 6000 series of Notebook PC's, CCFL Backlight, (From a quick search on the internet ),

For additional questions please post in a Comment.


Apr 14, 2012 | Dell Inspiron 6000 Notebook

1 Answer

My toshiba L35-S2161 the monitor only displays lines in colors, what to do to fix it

Since you diagnosed by using an external VGA monitor, you now know the fault lies in either the Video Cable, or the Display Assembly.

Your graphics chipset is good.
(Also known as GPU. Graphics Processing Unit )

A) Video Cable:
(Toshiba = LCD FL Cable )

See if the connections are good. Check the motherboard side connection of the Video Cable, AND the LCD screen side connection.

A loose connection can do this.



(On both links above you can click on the photos to enlarge )

Observe the sheath of the Video Cable for obvious signs of damage.
If the cable looks pinched, stretched, or torn, the tiny wires inside the cable may be damaged also.

Best method is to remove the Video Cable, and perform a continuity test of the wires inside the cable, with a multimeter.
(An economical unit can be purchased for around $8 to $12.
Analog or digital is fine )

B) Display Assembly:

Video Cable checks out OK;

1) Check the connections to the screen Inverter board.
Make sure they are tight. Make sure the Inverter board does not appear to be damaged.

2) Screen Inverter board:

An LCD screen does not produce light. It needs an additional light source.

A Backlight is the additional light source.
A Backlight is usually a CCFL, or a series of LED lights.

The Toshiba Satellite L35-S2161 Notebook PC, uses a CCFL for a Backlight. (Uses 1 CCFL)

CCFL stands for Cold Cathode Fluorescent Lamp
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

(Average size is 2mm Thick, and is close to the width of the LCD screen in question, Long )

A screen Inverter converts the power (Electricity) from the laptop, for the Backlight and LCD screen.

It is located behind the Display Mask, (Display Bezel), and mounted towards the bottom of the LCD screen.

A bad screen Inverter usually causes a garbled display, or doesn't light the Backlight up.

To test a screen Inverter you need a sensitive multimeter, or use a spare Backlight bulb that is known to be good.

Bulb lights up the Inverter is good, the Backlight in the LCD screen assembly, is bad.

[ The LCD screen is composed of layers. These layers are held in place by a metal Screen Frame. {Resembles a picture frame }

The Screen Frame comes apart.

Screws are removed, and the Screen Frame comes apart in four pieces, (Four sides), or the Screen Frame comes apart in two pieces as an Upper half, and Lower half.

The Backlight bulb is taped to one side of the LCD screen layers, and is under that side of the Screen Frame.

The LCD screen layers MUST be kept aligned, as they were from the factory. For this reason alone, it is tedious for an experienced technician, and is usually not done at the consumer, or DIY level.

More in a Comment.


Feb 05, 2012 | Computers & Internet

1 Answer

Dell inspiron

Meaning the graphics chipset is OK.

Problem lies with the Video Cable, or Display Assembly.
(Dell: Display Panel Cable = Video cable)

The Display Assembly is the;
1) Display Bezel: Plastic thin frame in front of the LCD screen.

2) LCD screen (Dell = Display Panel)

3) Screen Frame: The thin metal frame which surrounds the LCD screen layers, and also holds them in place. (Resembles a picture frame, and can be disassembled)

4) Camera (If applicable)

5) Screen Inverter: (Dell = Display Inverter)

The Display Panel Cable (Video Cable) is a thin flat ribbon cable.
One end connects to the motherboard, the cable then goes up by the left Hinge, and the opposite end connects to the back of the LCD screen, in the Display Assembly.

1) A connection may be loose. One end of the video cable may be loose, to it's connector.
BOTH the connection on the motherboard, AND the connection at the back of the LCD screen, need to be checked.

This means partial disassembly of the laptop body, to check the motherboard connection. It is under the Keyboard.
ALL power removed from laptop, AC adapter (Charger), and Battery, the Center Control Cover needs to be removed next, then the Keyboard,

Also look at the condition of the sheath, of the video cable. If there looks to be apparent damage to the sheath, the tiny thin wires inside may also be damaged. (Stretched/Broken)

Checking the connection of the video cable at the LCD screen, requires opening the Display Assembly.
This requires removing the Display Assembly first,

Both connections check out? Prove to be tight? (If you open the Display Assembly, and the video cable falls off, it wasn't tight)

I would then suggest performing a continuity check of the video cable.
Check each wire in the video cable. (Multimeter set to Ohm's, see if electricity passes through the wires. Continuity)

If the video cable proves to be good, then the screen Inverter is next.

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

A Backlight can be a CCFL, or a series of LED lights.
The Dell Inspiron 1545 Notebook PC uses a CCFL as a Backlight.

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
{ Example: 2mm Wide and 334mm Long. That is approximately a little thicker than 1/16th of a inch, (.078), and a little longer than 13 inches }

A screen Inverter converts the power (Electricity) from the laptop, for the Backlight, and LCD screen.

90 PERCENT OF THE TIME the fault is the Inverter.

Fortunately it is also the cheaper of the parts, when compared to an LCD screen, and is easier to access.

It is behind the Display Bezel, and mounted at the bottom of the LCD screen frame.

[ In the Display Assembly link above scroll down to the subheading -
Display Bezel.
In the first photo under the subheading, the screen Inverter is shown at the bottom, of the LCD screen.

This example shows it in more detail,

To test a screen Inverter you need a sensitive multimeter. This = $$$$
(Or you can use a good Inverter to test)
Barring that the two examples above are not feasible, the alternative is to buy, and replace the screen Inverter.

A) Video Cable checks out it's on to the screen Inverter.
B) Replace screen Inverter does not fix the problem, the problem is a bad LCD screen.

I'm betting on a loose connection of the video cable, at the back of the LCD screen. Just my thoughts.

Post back in a Comment, (Or Comments), as to your findings.


Jan 17, 2012 | Dell Inspiron 1545 Laptop

1 Answer

The power. Is on the computer is running, however. The screen is blank. What wrong no picture

See if the problem is in the Display Assembly, or the graphics chipset.

[ The Display Assembly is essentially the laptop's monitor.
A) The plastic Display Bezel in the front.
{Thin plastic frame in front of the LCD screen, and surrounds the LCD screen. Resembles a picture frame}

B) The LCD screen assembly.
{An LCD screen is composed of layers. The layers are held in place by a metal frame. This frame also resembles a picture frame}

C) The screen Inverter.
{Converts the electricity from the laptop for the Backlight, and LCD screen}

D) Webcam if installed

E) Backlight
{An LCD screen does not produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

F) Brackets on each side of the LCD screen assembly, plus various screws ]

[Graphics Chipset:

Chip and Chipset are slang terms for I.C.
Integrated Circuit,

The graphics chipset is a GPU.
Graphics Processing Unit,

Most of the time with a laptop, the GPU is soldered directly to the motherboard in a laptop.
Not removable ]

Laptop OFF, monitor OFF, attach a VGA monitor to the VGA connector on the laptop.

The VGA monitor can be a CRT monitor, (Looks like a small TV), or a flat LCD screen monitor with a VGA cable.

This is an example of what the VGA connector will look like on your laptop. May be on the back, or on the side, (Top right of page),

Turn the monitor on. If a CRT monitor allow it to warm up.
Turn the laptop on. By default the display should automatically be on the external monitor.
(VGA monitor)

If not press, and hold down on the Fn key, and tap once on the display toggle-over key.
(One of the F function keys at the top, (F1, F2, F3, F4, etc), will have a monitor symbol on it, with an arrow, or another monitor symbol close to it. This is the display toggle-over key.

If I knew the Model Number of this IBM laptop, I could tell you, and possibly show you, where the VGA port is on the laptop, and what key is the display toggle-over key)

Still no display on the external monitor? (VGA monitor)
Tap the display toggle-over key again. (Remember, you have to hold down on the Fn key at the same time)

No display on an external monitor, means there is a problem with the graphics chipset.
Generally requires motherboard replacement.

Display on the external monitor, means there is a problem with the laptop's internal monitor.
(Display Assembly)

As stated, an Inverter converts the electricity from the laptop, for the LCD screen, and the Backlight.

90 PERCENT OF THE TIME the fault is a bad Inverter.

Average cost of an Inverter varies, from $22 to $45.

Post in a Comment as to the Model Number.
This is in a white Service Tag, or sticker, on the Bottom of the laptop.
Perhaps I can find an HMM for this laptop.
(Hardware Maintenance Manual. Essentially a Service Manual)

For additional questions please post in a Comment.


Oct 09, 2011 | IBM Computers & Internet

1 Answer

When the computer comes on it starts fading out then it goes blank

Laptop? The Inverter is going bad. (Screen Inverter)

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.

Similar to the Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
(Average Backlight is approximately half the thickness of a No.2 pencil, and 3 to 4 inches long.
There are many variations, however)

An Inverter is used to convert the electricity provided by the laptop, for the LCD screen, and Backlight.

90 percent of the time the fault is a bad Inverter.

The Inverter is usually located behind the Display Bezel in the Display Assembly, and at the middle/bottom of the LCD screen.
It is a small circuit board.

Example of a typical Inverter,

[The Display Assembly consists of all the parts that make up the display.

A) LCD screen

B) Display Bezel (Thin plastic frame in front of the LCD screen, and surrounds the LCD screen)

C) Top Cover (Top plastic piece of laptop)

D) Screen frame (Metal frame that resembles a picture frame. Surrounds the LCD screen.
{The LCD screen is composed of layers. This frame keeps them in an aligned state)

E) Hinges

F) Hinge Brackets

These are a few of the Display Assembly hardware components.

What is the laptop manufacturer's name, and Model Number?
(On the bottom of the laptop is the Model Number. Sometimes referred to as Product Number. P/N)
If I knew this information I may be able to provide a link to a free Service Manual

For additional questions please post in a Comment.

Jul 03, 2011 | Computers & Internet

1 Answer

Every minute or so the screen flickers and kind of rolls for minute or so. if you hold laptop hard or hit it then stops flickering

Nice to know. So what is the problem?


See if the Display Cable has a loose connection.
The Display Cable is inside the Display Assembly, and comes out by one of the hinges, then plugs into the motherboard of the laptop.

The Display Assembly consists of the Top Cover, Bezel, LCD Screen assembly, Inverter, Display cable, and often the Wireless Antenna, and it's connecting cable.

Usual method is to remove all power to the laptop, AC adapter (Charger) and Battery.
Then remove the LED Display Cover, (Under the LCD screen, and in front of the Keyboard)
Then some have to have the Keyboard removed.

Check that connection.
Also remove the Bezel, (Frame going around the LCD screen on the inside), and check the LCD screen to Inverter connection.

If it all checks fine suspect the Inverter.

If I knew the laptop's manufacturer Name, and Model Number, I could give you more than the generic prattle above. (It's on the bottom of the laptop. Post in a Comment)

Oct 30, 2010 | Computers & Internet

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