Question about Toshiba Satellite A135-S4527 Notebook

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When power up lcd screen will not light up you can see program if you look hard some time it come right on other time you have to turn it back off and keep trying . external monitor work fine . if does appear it might stay on for hours or just a couple minute

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It is most likely the LCD back light's inverter. They can be obtained for $15-$45(US) and are fairly simple to replace if you know how to remove the bezel from your laptop's LCD.

you can get more detail here:

Posted on Feb 28, 2009

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My acer laptop blacked out yesterday but the programes are still running so i shut it down turn it on again and it worked but this morning i totally got a black screen and everything is dead i need help on...

if you still have lights on the laptop working but no lcd display and it sounds like the hard drive is booting then it could be lcd inverter or lcd display also check your memory that could be bad but if you have no power and no lights then its more than likely power on board

Mar 01, 2013 | Acer Aspire PC Laptops

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Toshiba a105 on start up screen is red, then goes black

The Toshiba A105 notebook computer is made for mobile computer users who need optimal processing power. The LCD screen is a 15.4 diagonal widescreen with TruBright technology. The laptop has a fast hard drive access rate that is in the 3ms range for the paging and access of data. There are problems that can occur with the Satellite A105 that can be solved by knowing what to look for when troubleshooting the system.

Black Screen Problem Black screen problems can occur when the Satellite A105 backlight is burned out or the inverter is not working correctly. The backlight can be replaced with a new LCD bulb manufactured for LCD screens. The inverter is a housing unit that controls the voltage to the LCD screen. The inverter must be replaced by a compatible A105 Satellite inverter unit. Power Problems b> During the power-up phase of the laptop, the Satellite A105 will quickly turn off without signing into the Windows Operating Screen. The problem can be due to a faulty power adapter that is not supplying the right amount of voltage to the system board. You can also check to see if the unit that houses the power plug is loose, which also indicates lack of voltage or electricity going to the board for power up operations. Hardware Conflict Problems b> Hardware conflicts can cause system errors or "freezes" by loading a new hardware component into the same hardware I/O address. The Satellite A105 has designated input/output addresses for peripheral devices, such as hard drives, video drivers and other hardware functions. To solve hardware conflicts, use the Control Panel "Hardware" device function to see which hardware I/O addresses is not being used. b> Audio Not Working Correctly b> Loading a new audio program can cause the audio codec for the Satellite A105 not to produce sound. The audio codec can be restored by loading the "restore system disk" for the A105 laptop. The restore menu provides options on certain components that you want to restore. If you pick the option for audio, the program will restore the audio to its factory settings. b> On-board LAN Switch Not Working b> The Satellite A105 is automatically configured to detect T Base 10/100 Ethernet networks. If the laptop does not recognize the on-board LAN switch, check the system setup to examine if the LAN switch is on. If so, a firmware update may be needed to upgrade the BIOS.

Jan 16, 2013 | Toshiba Satellite A105-S4334 Notebook

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I have a dark shadow on the bottom right corner of my new laptop

OK Mel, it's your dime.

The LCD screen is bad. It may be just the Backlight, but since you purchased this baby new; it will have LED backlighting. There is NO replacing the backlighting, there is ONLY replace the LCD screen.

Primer if I may;

An LCD screen does not produce light.

(Click on the monitor image)

An LCD screen needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, (Or two of them), or a series of LED's.
(Light Emitting Diode)

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

Average thickness is 2mm. That is a little larger than 1/16th of an Inch. (-> O <- approximate thickness)
Average length is almost as long, as the LCD screen is in height.

General example,

(View the last 8 photos)

Newer laptops like yours use a series of LED's.

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

LED backlighting does NOT use a screen Inverter.

When an LCD screen that uses LED backlighting, has problems with the backlighting, the entire LCD screen is replaced as a unit.

Is the problem with the LCD screen itself? Could be. The entire LCD screen is replaced. Either way, replace LCD screen.

Now,....the above is just GENERIC information.
I need the laptop manufacturer name, and model number. The model number may be on the Palm Rest Cover, to the right of the Touchpad.
It WILL be on the bottom of the laptop.
Post back in a Comment.

This way I can see if there is a link to give you for a free Service Manual, and perhaps some pictorial information also.
Then I will guide you step by step, and we'll get that LCD screen replaced.

It isn't hard at all, I assure you. YOU CAN do it.

Regards, joecoolvette

(Psst, they don't have them anymore because it was a special sale.
Whoever the laptop manufacturer is, though; is obligated to repair it. Kinda hard to get them to replace the entire laptop. DOES happen though.

Laptop was like that from the factory. Is not the consumer's problem, is the factory.

I don't care if it came from Best Buy, Tigerdirect, Newegg, or your uncle; the FACTORY is obligated to repair it. DOES NOT matter if it was a Black Friday sale, Christmas sale, or an Easter Egg hunt.

DO understand about the time frame thing, though. Plus DO commend you for your willingness to repair. It is people like you that built the world, not sat by and watched)

Nov 26, 2012 | PC Laptops

1 Answer

No display after reboot windows

If it seems like your system is running whereas you hear fans running, hear the hard drive running, see lights, heard the hard drive click during bootup, but there is nothing on the lcd screen then try the following:
1) Try hooking a external monitor to your laptop. It can be any type of monitor even one of the old style fat crt monitors as long as it has a vga cable to connect to the laptop. There is a sequence of keys you might have to hit to get the display to show on the external. Most times you hit the FN (Function key) and hold it while you hit the corresponding F1 thru F12 key that is for display. Usually the correct key will say CRT/LCD or it might have a display icon on it. If the image displays on the external monitor that means the video card is good.
2). Remove the external monitor and reboot the computer again. Now when it is done booting take a flashlight an shine it on the lcd screen. You are looking to see if you can faintly see the icons on the screen. If they are there but barely visible then the LCD Inverter is bad. The LCD Inverter is located at the bottom of the lcd screen just above the keyboard and the Strip around the lcd screen covers it. You'll have to take the lcd apart to get to it.
3) If you don't see anything when you shine a flashlight on the desktop, then the lcd screen has to be replaced. However, sometimes the cable on the back of the lcd screen has come aloose or just needs reseating, so unplug the cable and put it back then see if it shows an image.

Read Below if it is not booting at all when you press the power button.
Laptops don't boot for the following reasons: 1) Bad Power Cord. 2) Bad DC Power Jack where the power cord plugs into the laptop. 3) Static Charge Buildup. 4) Bad Motherboard.

The above 4 reasons are when you press the power button and absolutely nothing happens. You hear no fans running, no disk drive running, no one time clicking sound on the CD Drive and No light for a second or two when the CD drives click. In the case of a motherboard issue sometimes you will hear beep sounds or see blinking lights. Those beep sounds and blinking lights tells the technician what is going on with your motherboard and why it will not boot. If you see the blinking lights or hear beeps count them.

So you have a power light which means your power cord and dc power jack is good. So lets see if you have a static charge buildup.

Remove the Power Cord and the Battery from the laptop, then Press and Hold the Power Button for 30 seconds. After 30 seconds put the power cord back into the laptop, but leave the battery out. Press the power button to see if it boots. If it does you had a Static Charge Buildup and it's ok to put your battery back in. If it does not you more than likely have an issue with your motherboard.

Mar 23, 2012 | PC Laptops

2 Answers

Screen is not lighting while laptop is running.

Hook a spare monitor to the video output on the back of the laptop, if okay it means the video card is working fine. The problem is a bad inverter board, "located under the LCD display" or the back light is defective behind the screen, "usually means a screen replacement"

Apr 06, 2011 | Sony PC Laptops

1 Answer

When my m45-s331 laptop is turn on for a long time, if i put the monitor off, maybe in not be turn on again and it's brightness become very low and hardly it can be seen! what should i do?

It's possible that the LCD lid close switch stuck in the "closed" position and the back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
If it works on an external monitor most likely the LCD is faulty and needs replacement. If it's still under warranty, take it for a replacement. If not, you can do it yourself, it's pretty easy. Remove the rubber covers on the side of the screen, unscrew the screws take the plastic cover off, disconnect the video inverter and put in the new LCD after you connect the video inverter to it.

Jan 17, 2011 | Toshiba Satellite M45-S331 Notebook

3 Answers

I have a Compaq presario CQ61, an when i turn it on the screen is black other than some really dim writing i can hardly see. Help?

Try attaching an external monitor to the laptop & see if you could get any display on it. If this is successful, then you might have either a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Sep 23, 2010 | Compaq Presario Notebook

1 Answer

My Sony Vaio VGN FS630W turns on but noting shows on screen and looks like the hard drive is not loading. What should i do?

Your problem can be either a problem with the LCD connection or the laptop's suspend feature. Try this:

1. Close the LCD then open it again. Wait a few seconds and the screen should light back up if it is only a problem with the suspend feature.

2. If the above does not happen, do a hard shutdown by pressing on the power button for around 5 seconds. After it shuts down, turn it on again and the screen should light back up.

If the above does not work, seems you may need to have your laptop serviced.

NOTE: Please rate our help to keep this free service online.

Jan 09, 2010 | Sony VAIO VGN-FS630/W Notebook

1 Answer

Eee pc won't turn on (I think have already posted this,not sure)

Sounds like a classic case of hardware failure!!!!!!! possibly your motherboard, start by removing the battery, hard drive and optical drive.
disconnect the laptop monitor and connect the laptop to an external monitor.
remove the memory modules clean the brass contacts with a eraser and place back in the machine 1 at a time to check to see if they work, remember to plug in the AC power suppy, if you see the post screen then its a memory issue and you can then reconnect your laptop monitor to see if it lights up, if everything works but the monitor then its the inverter or backlight that has blown and is easily repairable saving you money on a brand new screen

Nov 13, 2008 | ASUS Eee 4G Notebook

1 Answer


First try this, right click on the desktop, click properties, open the screen saver tab, click the power button, then change the screen settings to never. If this doesn't work, then I'm afraid it's a hardware issue. Check the screen connections, connection to the back of the screen, screen to inverter, and screen to motherboard (under the keyboard), sometimes the connectors can work loose. If the connections are good, then the issue may lie with the inverter or screen itself. More than likely an intermittent problem with the inverter.

Jun 25, 2008 | IBM ThinkPad T30 2366 Notebook

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