Question about Palm Tungsten E2 Handheld

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Backlight not comming on

I can see the data on the screen if I hold it at an angle but the backlight will not come on so I can read the screen. It was working I added some photos to it and charged it and then I could not see anything.

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Probably the LCD screen is damaged. The backlight is integrated in the LCD asembly. You can get replacement LCD screens here:

Posted on Jul 06, 2008


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Will not retain screen image. Flashes the content when you push the on/off button and is clearly projecting data, but just in flashes.

It appears you may have a bad backlight. If you can see the picture content with a strong light shining at an angle to the screen while it is dark, then it is definitely the backlight. Most sets shut down shortly after getting a failure signal from the backlight inverter although you do not mention that happening.

The backlight uses two or more Cold Cathode Fluorescent Lamp (CCFL) tubes, and they'll have the same flickering as a failing standard fluorescent tube. If the light has a pinkish cast to it, this is a common sign that one or both of the tubes is bad. You may see the flashing on the top or the bottom and the other half of the screen will be dark; this means one tube is dead and the other is dying.

May 24, 2011 | Sony SDM-HS73P 17" LCD Monitor

1 Answer

My screen is totally blank. how can i diagnose what's wrong?

A) Suggest you start with seeing if graphics are being shown, but not displaying on the LCD screen.

May be an Inverter problem.

1) Laptop on, use a flashlight, and shine it at the LCD screen. Shine the flashlight at an angle.

Do you see faint images?

2) Laptop off, plug in a VGA monitor to the VGA connector on the back of the laptop. Turn the VGA monitor on, and turn the laptop on. (Do NOT have the laptop running, and plug the monitor into it)

This is what a VGA connector looks like,

(Photo to the right. The VGA monitor cable's connector is shown to the Left)

Press the Fn key, hold it down, and press the key that toggles over the graphics to an external monitor. The key will have a monitor icon symbol on it. (Empty rectangle)

Do you have graphics on the External monitor?

1) expounded on:

An LCD screen cannot produce enough light by itself.
For this reason an additional light source is provided.

A Backlight is the additional light source.

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

An Inverter is used to provide power for the LCD screen, and the Backlight.

The laptop's power is not enough to power the LCD screen, so the power is increased for the LCD screen by the Inverter.

The power from the laptop is too much for a Backlight, so the power is decreased for the Backlight by the Inverter.

90 percent of the time the problem is the Inverter, not the Backlight.
An Inverter is a small circuit board located within the Display Assembly.

The Display Assembly consists of;
1) The top panel of the laptop that you see with the laptop closed.

2) The LCD screen (Assembly. More on that in a minute)

3) The Bezel. The thin frame in front of the LCD screen, that surrounds the LCD screen. Looks like a 'Picture Frame'

4) The metal frame that holds the LCD assembly together, and it's screws.

5) The brackets that are screwed to the LCD assembly frame, and then the brackets are screwed to the top panel.

6) The Inverter. A small circuit board, (Usually as long as your longest finger, and about the same width), located BEHIND the Bezel, and at the bottom of the LCD screen

7) Wireless Antenna

8) Backlight. Description already provided. The Backlight is inside the metal frame that surrounds the LCD assembly. On one edge. (Sometimes more than one Backlight is used)

The LCD screen is an assembly. What you see on the outside is a protective screen.

If I may;

This is an example of an Inverter for an Everex Stepnote VA4300M,

I await your findings. Post in a Comment.

Nov 20, 2010 | Everex StepNote VA4300M Notebook PC

1 Answer

Sharp TV LCD experiencing black screen with lines update

hmmm does seem like the backlight inverter is bad there but if ya hold up a light to the screen and your seeing colors and movement then it was the backlight thats gone bad but if ya see nothing after shining a light at an angle at the screen then the picture board has gone bad with it

Apr 21, 2017 | Sharp LC-32AV22U 32 in. LCD TV

1 Answer

Screen is to dark. cannot see letters very well.

Suggest you press the Fn key And the key to increase brightness, first. (Should be a key that has a sun icon on it)

Barring this does not increase the visibility of your LCD screen, the I suggest the Backlight is bad, or the Inverter.

The Backlight is a type of CCFL tube (Cold Cathode Fluorescent Lamp) mounted to the LCD screen. The LCD screen needs the light given off of the Backlight.

Replacing the Backlight is a daunting task, and if done wrong, will cause possible damage to the LCD screen.

The LCD screen itself has a thin metal frame holding the components of the LCD screen together. This frame must usually be opened on the side that has the backlight, to access the backlight. The components that make up an LCD screen are fragile, and can easily be damaged.

The Inverter supplies power to the LCD screen, as well as the Backlight.
Inverters do go bad, but commonly it's the Backlight to go first.

This shows a typical Backlight replacement. It IS not an advertisement to attempt this yourself, but a reference tool for information.

Nov 16, 2009 | Itronix GoBook III Notebook

1 Answer

Audio but no pic. believe it the backlight. very handy is this a part avail for the DIY er

If you hold a flash light to the screen ,on an angle you should be able to see the picture in the background if its the backlight. Try lookin on ebay for the part or a site called

Nov 11, 2009 | ViewSonic N2750w 27 in. HD-Ready LCD...

1 Answer

Audio O/K no picture . Model Sharp LC-32SH12U. Thanks "Larry"

Check for a backlight failure by holding a flashlight on the screen at about a 30-degree angle, a couple of inches from the screen. Look at the area around the flashlight beam. If you see video, either your backlight fluorescent tubes are burned out or the inverter has gone bad. If you need tubes, search for "CCFL replacement" (CCFL = cold cathode fluorescent lamp").

Aug 10, 2009 | Sharp LC-32SH20U 32 in. LCD HDTV

3 Answers

Backlight went out

the HTC needs to be reflash to correct this take the phone to a mobile service center to have that done or try sourcing it online.

Jun 09, 2009 | HTC Touch HD Smartphone

1 Answer

Phone display is very dim-can barely read

Well, first you will have to check your options, if you can read it enough to get in there.  You may have the backlight turned off.  If the backlight is not turned off, then you probably have a bad backlight and will have to take it to your provider to get it fixed.  Replacing a screen/backlight is not something I would attempt to do unless you are certain you know exactly what you are doing as you can render the phone completely useless.  

May 28, 2009 | Motorola Mobility MOTO W755 Cellular Phone

1 Answer

Razr has no backlight

that happened to me too but i didnt get mine wet, it did the same as yours though my dad took out the battery for a while and then put it back in and it was fine! :) goodluck! only now it wont turn on! lol but it isnt from that.

Nov 27, 2006 | Motorola Mobility RAZR V3

1 Answer

Backlight problems

Well if you hold the power button too long the PDA will just turn off the backlight. If you just hit the power once and not hold it then it should shut off (of course it really never "shuts off" completly because if it did then you would loose all your data).

Sep 14, 2005 | HP iPAQ HX4700 Pocket PC

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