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Blemish on inside of screen, lower right, causing masking of figures.

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If your screen is a Flat Screen - push gently on the affected area, if the picture doesn't return to normal you will need a replacement screen.

If you have a CRT screen ( big fat one) You will need a new tube- these are prohibitivly expensive when compared to a new Flat Screen.

Sorry, but it looks as though you will need to repalce your screen.

Posted on Mar 22, 2011

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Qosimo e15 av101 back light is dim how do I fix it


swaffordrand,

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

A Backlight is a CCFL or a series of LED lights, (For present technology)

The Toshiba Qosmio E15-AV101 uses a CCFL.
Cold Cathode Fluorescent Lamp.

Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
(Usually 2mm Wide, by close to the height of the LCD screen, Long )

A screen Inverter is used to convert the power (Electricity) of the laptop, for the Backlight, and LCD screen.

90 PERCENT OF THE TIME the fault is the screen Inverter.

http://www.pelltechnology.com/Toshiba/Laptop/Toshiba-Portables-Qosmio-E15-Series/AV101/Toshiba-Qosmio-E15-AV101-Backlight-Power-Inverter.html

The front thin plastic frame in front of the LCD screen, is the Display Bezel.
Resembles a picture frame in it's design.

Toshiba's name is Display Mask.

The screen Inverter is located behind the Display Mask, and mounted at an area below the LCD screen.

A) Remove ALL power. Remove the AC adapter (Charger) and Battery.

B) It would be best to buy, and wear an ESD wrist strap. Average cost is around $3 to $6. (Electro Static Discharge}
Connect it's alligator clip to a good ground source.

One example,

http://www.radioshack.com/product/index.jsp?productId=2103245

Your body carries Static electricity. Static WILL fry out (Short Circuit) the delicate hardware components inside a computer. The ESD wrist strap prevents that.

It is arguable that you are just replacing a screen Inverter, and the above is 'over-kill'.
I would rather spend $6, and not have to worry that I could accidentally make my laptop an expensive paperweight, or doorstop.

Use a multi-compartment container for the various screws you will remove. SOME screws look VERY similar to other screws.

DO NOT mix them up.

C) Open the laptop, lay the Display Assembly all the way back. (Down)
Pull up on the right Hinge Cover, and remove it. Do the same for the left Hinge Cover.

To the immediate right of the right Hinge Cover, and immediate left of the left Hinge Cover, are two Philips head screws to remove.
These screw heads are covered by a piece of masking tape.

The tape is carefully removed, (May be able to use it again), and the two screws removed.

The Display Mask is very thin, therefore quite flexible.
The mask has plastic tabs that protrude from the outside edges.
There are matching tabs on the Display Cover.

(Display Cover: Plastic top cover of the laptop. Covers the LCD screen)

The Display Mask tabs snap into the Display Cover.

Go to either the Left side, or Right side of the Display Mask.
Go to the inside middle edge.
Halfway between the top and bottom of the Display Mask, and to the inside edge against the LCD screen.

Use a soft cloth laid on the LCD screen to protect it, and use a finger to gently start lifting on the middle/inside edge of the Display Mask.
(Cloth is to protect LCD screen from your fingernail)

With the Display Mask lifted in the middle, the width of a fingertip, ease another finger beside it. Start moving away from the first finger, and lifting up on the Display Mask.

The tabs of the Display Mask will start 'popping' out of the Display Cover.
Go around to the top of the Display Mask, and head towards the opposite side.

Once the Display Mask is halfway popped loose, the rest of the mask should come free.
Note that you have to slide the mask over to the Left, to clear the Latch, when removing the mask.

You will now see the screen Inverter,mounted to an area at the bottom of the LCD screen.

Unplug the cables from the Left, and Right side of the screen Inverter.
Note that the connectors on the cables are different, and can't be mixed up, as to where they plug in.

Remove the single Philips head screw from the bottom/middle of the screen Inverter.

Test the screen Inverter before removing;
This requires a sensitive (Read fairly expensive) multimeter,

http://www.fonerbooks.com/test.htm

Due to;
A) Low Cost,
B) Ease of access,
C) No tool available to test,
D) 90 percent of the time the fault is the Inverter,
the screen Inverter is usually replaced by the consumer.

Backlight:

If the screen Inverter proves to Not be the problem;

http://www.pelltechnology.com/Toshiba/Laptop/Toshiba-Portables-Qosmio-E15-Series/AV101/Toshiba-Qosmio-E15-AV101-CCFL-Backlight-Bulb-for-LCD.html

Replacing is a procedure that is fairly intensive, even for an experienced tech.

Why?
The LCD screen (Toshiba = LCD Module) is composed of many layers.
These layers are set in a specific pattern by the factory.

The layers are held in place by a Screen Frame. A thin metal frame that resembles a picture frame. (Toshiba = P-Chassis )

Part of the screen frame is removed. The screen frame Bezel.
(P-Chassis Bezel)

[ The P-Chassis, or screen frame, is composed of TWO parts. The lower main half which is the P-Chassis, and a thin upper half which is the screen frame Bezel, or P-Chassis Bezel.

This will all make more sense when you view it in the Service Manual, on Page 281 ]

Anti-Static computer gloves are usually worn to prevent soiling the LCD Panel, (LCD screen)
(Soiling = Oil from your fingers, dirt, and also helps prevent scratching the LCD screen )

There is a panel, or Board, that goes across the top. Three screws are removed. Then open the bent portion of the TCP of the board, and remove the Backlight.

The Display Assembly needs to be removed from the laptop, in order to perform replacing the Backlight lamp. (Bulb)

General example,

http://www.ccfldirect.com/lcdtutorial.html


Another one,

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

Service Manual link to be included in a Comment, along with more pictorial information.

Regards,
joecoolvette

Feb 25, 2012 | Toshiba Computers & Internet

1 Answer

I have a sony xbr tv and after moving it, now THE TOP half of the screen is greenish. how can i fix this?


MAKE SURE NO SPEAKERS WITH BIG MAGNETS ARE ABOVE OR NEAR THE TOP OF THE SET--magnets can cause "purity" problems.

The set has a built in coil to correct this every time you turn the set on.

IF THE SET IN THE MOVE FELL FORWARD, IT MAY HAVE DAMAGED THE SHADOW MASK INSIDE THE TUBE.....

TWO REASONS FOR YOUR PROBLEM: COIL IN SET NOT WORKING FOR SOME REASON---ROTATE SET LEFT AND OR RIGHT AND SEE IF PURITY CHANGES OR BECOMES GOOD.

IF SO A MANUAL COIL CAN BE USED (CALLED A DEGAUSSING COIL) TO CORRECT IT--TAKES 5 SECONDS.


SECOND: SHADOW MASK IN TUBE (SCREEN) IS DISLODGED BY MOVE----THESE ARE VERY HEAVY SETS AND THE MASK IS EASY TO DAMAGE.

The mask is inside the tube and perforated with hundreds of tiny openings that line up with the phospher coating (stripes if you look close at set with it on) if mask got dislodged in move--damage is permanent.

If changing north,south, east or west position of front of set corrects it mask is good.

Unlike others who have bid I am answering this for free, if I told you something you did not know rate this free solution as very helpful.

SD TECH

Aug 21, 2010 | Sony KV-40XBR700 40" TV

1 Answer

Dark spots that look like clouds on screen and they will not go away


It’s a blemish it wil not go away its inside the screen need to change the screen

Aug 18, 2010 | Sanyo DP32746 32 in. LCD Television

1 Answer

PLASMA SCREEN BLEMISH


This phenomena is called mal-discharge on plasma televisions. When this problem is encountered, it is important that all adjustments be checked and corrected. It is possible that this will resolve the condition. If however, after adjusting all adjustments correctly and according to the specific Panel’s voltage label the problem still exist, then it is necessary
to upgrade the Control’s boards ROM software. You have to ask the help of a qualified technician to do the adjustments or the ROM software upgrade.

Nov 02, 2009 | Televison & Video

1 Answer

REDENT PURCHASE OF TV'S Have green in some spots.


This is typically referred to as a color purity problem and can be caused by two main things. The first cause can be stray magnetic fields which can 'magnetize' the TV screen either by something magnetic begint oo close to the screen or having turned the direction of the TV while it is turned on. If this is a purity issue caused by magnetic fields, it can usually be cirrected by powering off the TV for about 1/2 hour and turning it back on. All tube TVs have build in 'degaussing' circuits to cure just this issue.

If this doesn't fix it the other cause is a shifted shadow mask inside the picture tube itself and cannot be corrected.

May 25, 2009 | Televison & Video

1 Answer

KV-36XBR200 Green in lower left corner


The most common cause is, shadowmask inside of the CRT is magnetized. It sounds by your description that the TV's internal degausser for the CRT is not working. This is serviceable by a service tech.

Most of the time the cause of a failed degausser is the thermoresistor. This is a common type of failure.

Another cause that can show the fault you are seeing is if the shadowmask in the CRT is defective. Sometimes the mask is damaged when the set is being moved, and is accidently banged against something. The CRT is sensitive to this type of treatement.

If the mask inside of the CRT is defvective, the only fix is a new CRT.

Jerry G.

.

Apr 25, 2008 | Sony KV-36XBR450 36" TV

1 Answer

Question for stove top repair


is it on the metal rim??? or on the galss, "blemish"?? is it raised??? or something spill and cook onto it???

Mar 06, 2008 | Maytag MEC5430BDS Electric Cooktop

1 Answer

Lg 44inch dlp


This could be a problem with the light funnel or alignment of the light engine.
I woud contact a service center for a quote.

Nov 19, 2007 | LG RU-44SZ51D 44" Rear Projection...

1 Answer

Color problem in corner


Do you have a speaker or fan or any type of electrical device around that area next to the tv? If so move it. Also either way yes or no turn the set off then let it sit 30 mins and turn it back on to degause the screen. If none of the above solve this get a deguassing coil and try manually degausing the screen. If this has no affect then the shadow mask inside the tube is warped and the tube would have to be replaced to correct the problem.

Sep 15, 2007 | Sony Grand WEGA KDF-42WE655 42" Rear...

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