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No on-board or extrnl display graphics (('no signal' message on external monitor (vga) goes away, but no graphics)) on my toshiba sattellite l7555d-l7006.

I game and watch a lot of youtube. my laptop is almost always on. this has happened b4, but always worked again after a rest.

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  • Master
  • 545 Answers

Not displaying on an external monitor generally means that the video or system board is bad. There isn't much to be done for it.

Posted on Nov 09, 2012

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LaptopExpert
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SOURCE: HP dv6000 Laptop LCD has no graphics (Always white)

HOW TO FIX YOUR DV6000/DV9000/DV2000
All the Problems described are Graphics Related..

Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..
The symptoms of the Laptop Powering on and Shutting Off Repeatedly..Or.. Powering On and Having No Video...Or... Power Strip Lights Up, Beeps,Shuts Down...Or..No Power At All...Or.. Intermittant Loss Of Wireless/Video Goes In And Out/Touchpad Slows and Freezes..
To Fix this issue, You will need to Reflow The Graphics Chip.
I will Explain In Full Detail As To The Correct Method Below....
HP DV6000/DV2000/DV9000 Compaq v2000 Video Chip Reflow Instructions
First Step Is Complete Disassembly Of All Parts And Components..
Remove RAM, Remove CPU, Of Course Remove Heatsink and Fan assembly.
Next Step is Insulating the Motherboard... You need to Protect The CPU area, The RAM area, Cover any plastic Plug ports.
Try to leave 1/4 inch area around the edge of the chip free of insulation.
To Insulate the Board.. I use thick pieces of Tin/Aluminum, you can fold up some aluminum foil (tin foil) About 4 folds thickness....
Now that you have your Motherboard Insulated... Make Sure There's Nothing Flamable Or Burnable Below the Motherboard... it will get quite hot underneath.
You will need a Heat Gun.. You can get one of these at your Local Home Improvement Store, they cost about $15 - $30.. You Will Use ONLY the LOW Heat Setting... I REPEAT..... USE ONLY THE LOW HEAT SETTING ....
Next You Will Need Some Coins.. Yes Coins..
8 Quarters and 2 Nickels... Put the 2 Nickels On the Bottom and Stack Quarters On Top...
Place The Stack Of 2 Nickels And 8 Quarters On Top Of The Graphics Chip...
The Reason for using the Coins: Using the coins serves a few purposes...
1) It Helps Transfers the heat Into The Chip More Evenly/Slowly
2) It Helps Hold The Heat Longer/Then Helps To Cool Slower
3) It Gives The Correct Amount Of Weight That Is Needed To Press The Chip

A Thing To Look Out For...
Hewlett Packard is nutorious for using the RED epoxy around the edge of the Graphics chip.. this epoxy is used to help secure the chip to the motherboard...
This is a process that is Hand Done at the Factory.. And Some Boards Will Have Only A Little Amount of this, Some Will Have Alot of it...And Some are Only Done On The Corner Edges....
If There Is Alot of This On Your Chip, You Might End Up Needing To Carefully (REAL CAREFULLY) Remove as much of this epoxy as able to....You can use a Razor Blade To Lightly Scrape This Off... DO NOT MISS AND SCRATCH THE MOTHERBOARD!!! Go SLOW...
Now Comes The Heating Of The Chip...
Start With The Heat Gun About 6 Inches Away From The Top Of The Quarter Stack..You want to be holding the gun at a 45% angle.. Aim the heat at the Edge of the chip, You Will Start Rotating Around the Chip- around the outer edge of the chip...then use tighter circles concentrating on the quarter stack, then after about 30-40 seconds, slowly move closer to the chip...
Never Move the Heat Gun Closer than the Top Of Your Coin Stack...Then Pull It Back And Slowly Repeat.. The Chip Needs To Get Hot Enough To Re-Melt The Solder Balls On The Underside Of The Graphics Chip Back Down To The Contact Pads On the Motherboard.. and this takes Quite Alot of heating to Do.... You Must Not OVERHEAT the CHip... It Is Best To Underheat it and have to Redo.. than to overheat.. It will cause the solder to break down and even crack/split.. causing failure forever...
This process will take about 3 minutes total.. Once you shut off the Heat Gun.. Leave The Stack of Coins On The Chip And Let Sit For Another 5 minutes..
Now Remove The Coins(carefull they might still be hot)
Remove All Insulation.. Reinstall RAM, CPU, Heatsink and FAN Assembly (and Of Course Thermal Pads or Paste.. Note:. If Paste Is Used.. It Must Be Silver Paste...
Now You Can Connect The Power Button Strip/ Video Cable And The DC Jack Cable.... And Plug In AC adapter .. You're Now Ready To Test For Solid Power and Video....
Upon Sucessful Chip Reflow/Rebake.... You Need To Go To The HP Website..( www.hp.com )..Click on SUPPORT AND DRIVERS, then select...DOWNLOAD DRIVERS AND SOFTWARE....Then either click the box to Auto-Detect System, Or Enter Your Make/Model Info, Once At The Page With All Of Your Drivers.... Choose The BIOS UPDATE Driver..
Choose The Newest Driver And Download/Install It... It Will Reboot The Laptop And Upon Rebooting, Your Fan Will Spin Faster And More Often Due To A Thermal Controller Update In The BIOS Update...

Posted on Nov 23, 2009

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1 Answer

Toshiba Satellite A505 - Most of the time when I turn it on the screen is grey, with no text.


This sounds like a bad display on the laptop. Hook up an external monitor to the vga port on the laptop. You may need to toggle the display to output to the external monitor. This is generally accomplished by pressing the "FN" key + one of the F# keys. Look for an icon that resembles a monitor or it may say LCD. If the graphics display correctly on the external monitor, then you will need to replace the computer screen.

Dec 29, 2012 | Toshiba Computers & Internet

1 Answer

Toshiba a305 Screen Blank on Power up.


Yes, the first step would be to use an external monitor. You may have to use the FN key with a function key to tell it to use the external monitor. If the external monitor works, try shining a bright flashlight on the display. If you can see images, then the display itself is probably OK and either the back light or inverter are bad.

If the external does not work and shining a light on the display does not show images, then it could be graphics card or main board.

Does the laptop make any noises? e.g. Can you hear fans, hard drive, does the CD light come on during boot up. If yes, to all the above, then the mainboard seems to be OK and it could be graphics or display. If unsure, you can remove the RAM chips and it should beep upon startup to say there is no memory and this is a good indication that the mainboard is functioning somewhat.

Good luck and post your results for further help and to let me know if you have figured it out.

Aug 21, 2012 | Toshiba Computers & Internet

1 Answer

I turn on my computer and i don't see anything


Guess what? I don't see it either.

Oh,....that's because you're there, and I'm here, and.............never mind.

(OH, I'm jus jokin'!)

Would be helpful to know the laptop manufacturer name, and model number, though. The name you know, the model number is on the bottom of the laptop.

Diagnose to see what the problem is;

A) Graphics chipset,
Or
B) Video Cable,
Or
C) In the Display Assembly

1) Suggest start with attaching a VGA monitor to the laptop.

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

Example of a VGA Cable, and VGA connector,

http://en.wikipedia.org/wiki/VGA_connector

You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

2) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on. By factory default the display should show on the external VGA monitor.

IF not;
There are at least 3 display options available,

A) Internal monitor of laptop ONLY
B) Internal monitor of laptop AND external VGA monitor
C) External VGA monitor ONLY

Hold the Fn key down, and tap once on the Display Toggle-Over key.
Which key is the Display Toggle-Over key?
Don't know. You didn't state the laptop manufacturer name, and model number.

It is one of the F keys at the top. F1 through F12.
Usually has a monitor symbol on it, and a side arrow.
(Most of the time the F4, F5, F7, or F8 key)

No display on the external VGA monitor?
Hold the Fn key down again, and tap once more on the Display Toggle-Over key.

Still no? Bad graphics chipset.

Display shows on external VGA monitor? Problem is the Video Cable, or in the Display Assembly.
Post back in a Comment after you have performed this procedure, and also post the manufacturer name, and model number.

If the graphics chipset is good, we'll go on with the diagnoses if you wish.

Regards,
joecoolvette

Jul 14, 2012 | Computers & Internet

1 Answer

Screen blank with white dot


Problem with;

1) Video cable:

A) Video cable connection on motherboard side is loose, and/or on back of LCD screen.

B) Video cable is damaged.

2) screen Inverter:

screen Inverter is bad.

3) LCD screen:

LCD screen is bad.

4) Graphics chipset:

Graphics chipset is bad.

Suggest you connect a VGA monitor to the VGA port (Connector) on your laptop.
See if the problem is the graphics chipset, Or video cable, Or display assembly.

You didn't state what manufacturer and Model Number of laptop this is.
All I can do is state generic information.

This is an example of a VGA Cable, and VGA connector,

http://en.wikipedia.org/wiki/VGA_connector

The VGA connector will be on the side, or back of your laptop.
For the VGA monitor you can use a CRT type monitor, (Looks like a small TV), or a flat LCD screen monitor that has a VGA cable.

Laptop OFF, monitor OFF, connect the external VGA monitor to the laptop.
Turn the monitor on. If a CRT type allow it to warm up.

Turn the laptop on.
By default the display should show on the external VGA monitor.
IF not;

There are at least 3 display options.
1) Laptop internal monitor ONLY
2) Laptop internal monitor AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold down on the Fn key, and at the same time tap once on the Display Toggle-Over key.
(For an example HP's usually use the F4 key for a Display Toggle-Over key)

Display shows the same on the external VGA monitor?
You have a bad graphics chipset.

[ Some laptops have been erroneously stated as having a graphics card, when in fact they do not.
The GPU (Graphics Processing Unit) is soldered directly to the motherboard.
This is Integrated Graphics.

http://en.wikipedia.org/wiki/GPU

There is no changeable, replaceable graphics card. Therefore the solution is motherboard replacement ]

IF, the display is good on the external monitor, you have a problem with the Video Cable, and/or in the Display Assembly.

After diagnosing with an external VGA monitor, post back in a Comment.
Also post the manufacturer name, and model number of the laptop.

Regards,
joecoolvette

Apr 22, 2012 | Computers & Internet

1 Answer

Toshiba satellite l655-s5058


1) Laptop OFF, monitor OFF.

2) Connect the VGA cable of the VGA monitor, to the VGA port on the Left side/Rear of the laptop.

You can use a CRT monitor (Looks like a small TV), or a flat LCD screen monitor with a VGA cable. (Or DVI to VGA adapter on the cable)

3) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By default the display should show up on the external VGA monitor.
If not,

Press the Fn key down, and hold it down. At the same time tap once on the F5 key.

No display? Hold the Fn key down again, and tap once more on the F5 key.
There are at least 3 options available;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Intel GMA 4500M graphics chipset. It is Integrated Graphics, and NOT a graphics card.

The GPU is soldered directly to the motherboard,

http://en.wikipedia.org/wiki/GPU

http://en.wikipedia.org/wiki/Intel_GMA#Graphics_Media_Accelerator


User's Guide. Allow a few seconds for the page to load,

http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=SB&os=&category=&moid=2681569&rpn=PSK2UU&modelFilter=L655-S5058&selCategory=2756709&selFamily=1073768663

For additional questions please post in a Comment.

Regards,
joecoolvette

Feb 17, 2012 | Toshiba Computers & Internet

1 Answer

My toshiba laptop will boot when I power up but the screen stays black


Jeff, connect an external monitor for a diagnostic test.

Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port on the back of the laptop,
(RGB/Monitor connector,

http://en.wikipedia.org/wiki/VGA_connector )

The external/VGA monitor can be a CRT type (Looks like a small TV), or a flat LCD screen that has a VGA cable.

Turn the external monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By default the display should show on the external monitor. If not press, and hold down on the Fn key, and tap the F5 key. (One of the Hot Key's)

If the display still does not show, hold down on the Fn key, and tap the F5 key again.
There are three display options;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external monitor
3) External monitor ONLY

If graphics show on the external monitor, you have a problem in the Display Assembly, and/or the Video Cable.

If graphics do Not show on the external monitor, you have a problem with the graphics chipset on the motherboard.
(ATI Radeon 3100)

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-Pro-L450-L455/laptop-disassembly-1.htm

Video Cable
1) Could be the connections. The connection of the video cable TO the motherboard, and the other end of the video cable TO the back of the LCD screen. (In the Display Assembly)

2) Could be damage to the video cable. Check the sheath of the cable for obvious signs of damage. If so, the thin tiny wires inside may be damaged also.

Cable should be checked for continuity of each wire in the cable. (Ohm's with a multimeter)

Video Cable condition, and tightness of connections check out, it's on to the screen Inverter.

Primer:
An LCD screen does not produce light by itself. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL, or a series of LED lights.

The Toshiba Satellite L455D-S5976 Notebook PC, uses 1 single CCFL for a Backlight.
Cold Cathode Fluorescent Lamp.

Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

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

90 PERCENT OF THE TIME the fault is the Inverter.

The screen Inverter is a small rectangular circuit board, and is located behind the Display Bezel, an at the bottom of the LCD screen,

Example of screen Inverter,

http://www.battery-stores.co.uk/laptop-inverter.php/toshiba_Satellite+L455D-S5976_205_5226.htm

Link to a free Service Manual for the Toshiba Satellite L455D series of Notebook PC's,

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-toshiba

Under the main Toshiba heading go down to the subheading -
Satellite A10. (A10 is in blue)
In this 'paragraph' go down to the third line, and scroll across to -
L450D, in blue.
Click on L450D.

This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on the file name { L450D } it may take up to 30 seconds before the first page comes up.

Would appreciate it if you would post back in a Comment with your findings.
Regards,
joecoolvette

Jan 15, 2012 | Toshiba Satellite L455D-S5976 Notebook

1 Answer

Toshiba satellite monitor is scrambled, how to fix?


Check to see if the problem is the screen Inverter, or the graphics chipset, or the LCD screen.
Use an external monitor as a test.

If the screen of the external monitor shows a scrambled display you have a problem with the graphics chipset.

If the screen of the external monitor does Not show a scrambled display, you have a problem with the screen Inverter, or the LCD screen.

90 PERCENT of the time the fault is the screen Inverter.


External Monitor;
1) You can use a CRT monitor, (Looks like a small TV), as a VGA monitor,
Or
2) You can use a flat LCD screen monitor that has a VGA cable.

A) Laptop OFF, and monitor OFF, attach the VGA cable from the External monitor, to the VGA port on the Toshiba Satellite A205 series Notebook PC.

This is an example of a VGA cable, and it's connector, and a VGA connector on the laptop,

http://en.wikipedia.org/wiki/VGA_connector

B) Turn the monitor on. If it is a CRT style let it 'warm up'.
Turn the laptop on.

C) The display is supposed to automatically show up on the external monitor.
If it does not, press, and hold down on the Fn key, and also press the F5 key.

Still no?
Holding the Fn key down, tap the F5 key again.

Display good on external monitor? Problem lies with the screen Inverter, or the LCD screen.
Either OR.

Primer:
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.

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

As previously stated, 90 PERCENT of the time the fault is the Inverter.

Laptop open looking at the display assembly, the plastic thin frame in front of the LCD screen, and surrounds the LCD screen, is the Display Bezel. (Resembles a picture frame)

The Display Bezel is removed to access the screen Inverter.
The Inverter is right behind the Display Bezel, and located at the bottom area of the LCD screen.

The Display Assembly has to be removed from the laptop, to remove the Display Bezel.
Toshiba's term for the Display Bezel is Display Mask.

The Toshiba Satellite A205-S5804 Notebook PC is one of the Satellite A205 series of Notebook PC's.
This is a link to a free Service Manual for a the Satellite A205 series of Notebook PC's,

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-toshiba

Scroll down to the second Satellite heading. The one that begins with Satellite A10.
Scroll across, and click on A200.

After you click on A200 it may take as long as 30 seconds before the first page comes up.
It may also take additional time for the file to fully download.

At the top of the PDF file is the page number box. It is to the right of the Down Arrow.
Go to Page 146.
4.10 Display Assembly

Page 151 shows how to remove the Display Mask.
4.11 Display Mask

Page 153 deals with the screen Inverter.
4.12 FL Inverter Board

Takes a really sensitive (Read fairly expensive) multimeter to test an Inverter.
Due to the low price, and ease of replacing, the screen Inverter is replaced to test whether the old one is bad.

Example of a screen Inverter (FL Inverter Board) for a Satellite A205-S5804 Notebook PC,

http://www.batterysupport.com/toshiba-satellite-a205-s5804-inverter-p-216526.html

Compare to the price of a replacement LCD screen,

http://www.laptopscreen.com/English/model/Toshiba/SATELLITE~A205-S5804/

To summarize so far;
1) Display shows good on external monitor. Replace screen Inverter. Still the same problem? Replace the LCD screen.

2) Display on external monitor is scrambled also?
Fault lies with the graphics chipset.

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

http://en.wikipedia.org/wiki/Integrated_Circuit

The graphics chipset is a GPU.
Graphics Processing Unit,

http://en.wikipedia.org/wiki/GPU

The GPU for a Toshiba Satellite A205-S5804 Notebook PC (Part Number PSAF3U-0NR00V), is an Intel (Mobile) GL960 Express,

http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Core_2_mobile_chipsets

It is soldered directly to the motherboard, therefore it is Integrated Graphics.

{Integrated Graphics is also known as OnBoard graphics.
ON the motherBOARD.
The GPU is soldered to the motherboard.

In comparison if the GPU were soldered to a removable adapter card, it would be a graphics card, and Not integrated graphics }

This means if the graphics chipset is found to be bad, motherboard replacement is the solution.

{ Disassembly guide,

http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/laptop-disassembly-1.htm }

For additional questions please post in a Comment.

Regards,
joecoolvette

Nov 05, 2011 | Toshiba Satellite A205-S5804 Notebook

1 Answer

I want to connect external monitor to my laptop - connections are different - how can I resolve this?


ur monitor will have a signal cable that will be quite thick with a conenctor that will have about 15-16 pin holes in them....
the same will can be inserted in ur laptop's monitor out jack(loo at back side of ur base of laptop) that will have small pins 15-16 in them)...the connector goes in only one way....

Jan 16, 2010 | Toshiba VGA Board Graphic Card

1 Answer

External monitor connection problem


If you are comfortable with opening your case up you need to follow wiring from plug to system board checking proper connection to the board. If not comfortable or connections are ok then a local computer shop is your best bet.

Jan 29, 2009 | Toshiba VGA Board Graphic Card

2 Answers

"No signal detected" when LCD connected with DVI-D Cable


Thank you for providing your configuration details.
You have failed to specify wheather or not your LCD Display is under Warrenty.

Perhaps these simple trouble shooting procedures will get the job done.

1. use the DVI to VGA adaptor that came with your card

Plug in a regular CRT monitor to the Primary Display Output Port using the DVI to VGA adaptor
( either port can be designated as the primary by you )
I like to use the Port nearest to the motherboard as the Primary

2. plug in the your LCD monitor on Secondary Display port using your DVI cable

At this point you should be able to see your desktop on the Primary CRT Display

3. Go to the display properties and use the Nvidia Dual Display Setup Wizard

set both desktops to CLONED at a resolution of 1024x768 and set the refresh to 60Hz
which is default for most LCD displays , some have higher refresh rates , consult your user manuel

If the display resolution and refresh are set incorrectly for your CRT or LCD you will see
Signal Out of Range ( if the display has the ability to display that error message )

At this stage both displays should be showing a Windows Desktop

If you now see your desktop on both displays , you can now put the LCD on the Primary Port



No Signal Detected ( this means the display device is not receiving a signal )

If your LCD display is still displaying the error message
"No Signal Detected" after performing the trouble shooting proceedures
You may need to read the user manuel about how to enable DVI signal input.

If you are certan you have done everything correctly but still see only "No Signal Detected"

Your LCD Display may need replacement

Loch Hime :-)

Sep 14, 2008 | BenQ FP71E 17" LCD Monitor

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