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LCD failure When my laptop is turned on, the LCD fails to activate, or there is nothing that is seen on the LCD - no light, nothing whatsoever. Didn't do anything. Am afraid the problem might worsen.

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Re: LCD failure

If you have a desktop monitor plug it up to the back of the laptop. Press the fn + the (f function key)ex.. f5, f6 or the one which shows a picture of a monitor. If you get something on the monitor screen.... then the problem is either your backlight or inverter board. Hope this helps

Posted on Oct 05, 2007

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Laptop beeps 7 times

Try link: How to identify beep codes: When a laptop or computer first powers on, it goes through an initial set of diagnostic tests to make sure vital components are preforming correctly. These tests are called POST or Power On Self Test. When a test fails, the user is notified via POST codes, Light codes, or Beep codes. For diagnosing Beep codes you need to:
  • Power on the laptop or restart it if it is already on.
  • Listen to the number of consecutive beeps when the computer begins to boot. Restarting the laptop may be necessary and should not harm the laptop at this time.
Dell Inspiron M501R (M5010) Beep Codes # of Beeps Description Possible Cause(s) 1 BIOS ROM checksum in progress or failure System board failure, covers BIOS corruption or ROM errors. 2 No Memory (RAM) detected Memory or Memory slot failure 3
  • chipset Error (North and South bridge error, DMA/IMR/Timer error)
  • Time-Of-Day Clock test failure
  • Gate A20 failure
  • Super I/O chip failure
  • Keyboard controller test failure
System board failure 4 Memory read / write failure Memory failure 5 Real Time Clock (RTC) power fail CMOS battery failure 6 Video BIOS test failure Video subsystem failure 7 CPU Cache test failure Processor failure or motherboard failure 8 LCD LCD failure Most Common Fixes:
  • 1 Beep: Replace the motherboard / system board.
  • 2 Beeps: Reseat the memory or replace the memory.
  • 3 Beeps: Replace the motherboard / system board.
  • 4 Beeps: Reseat the memory or replace the memory.
  • 5 Beeps: Replace the CMOS battery.
  • 6 Beeps: Reseat or replace the video card or replace the motherboard / system board.
  • 7 Beeps: Reseat or replace the CPU or replace the motherboard.
  • 8 Beeps: Reseat the LCD cable or replace the LCD screen.

Jul 21, 2014 | Dell Inspiron M501r Laptop Computer (AMD...

2 Answers

Dell studio 17 1745 laptop don't turn on anymore. Just hear DVD drive make a little noise ( normal when turning on ) then light flash as seen in video then dies.

That looks like a pre-programed system alert code to me that activates when a certain problem arises. Check your user's manual for system alerts. If no joy, try contacting Dell and simply ask them what that particular alert means. If they want to charge you (typical of these manufacturers) throw yourself on their tender mercy and say that you are not asking them to repair it, you only want to know where you can find what that alert means. It's worked for me in the past. Also try the Dell website for your model, they may have it posted there.

Feb 25, 2013 | PC Laptops

1 Answer

Why does my dell inspiron m5030 laptop give me a series of 5 beeps and wont boot when I try to turn it on?

Please read this:

Beep Codes Beep Code Description Failure Coverage 1 System Board: BIOS ROM failure System Board, covers BIOS corruption or ROM error 2 Memory No Memory / RAM detected 3 Chipset Error (North and South Bridge Chipset DMA/IMR/ Timer Error for Intel platform); Chipset Error System Board Chipset Failure Time-Of-Day Clock test failure. Gate A20 failure Super I/O chip failure Keyboard controller test failure. 4 RAM Read/Write failure Memory failure 5 RTC Power Fail. CMOS battery failure 6 Video BIOS Test Failure Video card / chip failure 7 CPU Cache Test Failure CPU failure 8 LCD LCD failure

Jan 12, 2013 | Dell Inspiron M5030 Laptop

1 Answer

Laptop wont turn on, got green pwr and amb bat but will not fire up

Systems covered: All failing to boot without lighting up display.

Goal of this Solution: Try to determine whether system is (a) booting successfully while failing to light its display (indicating hardware failure in the display), or (b) failing to light the display due to failure to successfully transfer control to ROM BIOS (indicating a motherboard failure).

The fact that the Green power LED, and Amber Battery LED are lit seems to exonerate the laptop power supply (brick) circuitry. Even with a nearly dead battery, a Toshiba Satellite 1135-s1552 should work while plugged into a properly functioning brick.

Here's Toshiba support's (244 page) online PDF version of your laptop manual:

If the HDD (hard disk) activity indicator LED is active after power-on, then your system has actually got past BIOS and is booting - your LCD monitor inverter circuit or Backlight may have burned out - and to use the system, you'll need to connect an external monitor to the RGB monitor port on the back of the system (see illustration on page 32 of User's Guide) to view system activity.
Alternatively, one may attach an analog TV, using the S-Video port on the back of the laptop (see illustration on page 32 of User's Guide).

Once an external monitor is working to display the ROM BIOS part of the boot sequence, you may find that the ROM BIOS is good enough to run a few BIOS-based diagnostics. Run them all - something may indicate the source of the boot failure. Ofttimes, enough of the motherboard remains good to provide interaction with the ROM BIOS, but some motherboard failure will subvert a full boot to Windows/Linux. An example of this type of failure would be a failure of the PCMCIA bus controller, which is vital for booting a disk-resident OS, but unaccessed (except by BIOS diags) when the user interacts with BIOS. Another common failure of this type is main memory (RAM) failure.
A working external monitor/TV also provides a chance to backup important laptop data to a flash drive, sky drive, or CD-RW discs.

If no HDD activity is seen after power-up, then either your BIOS is hosed (in which case you'll need a new motherboard), or another motherboard component is hosed (in which case you'll need a new motherboard).

You may want to transplant the HDD into a working PCMCIA-bus system (any laptop) to recover/backup your important data.
If someone recently attempted and failed to update the motherboard's ROM BIOS, then you know why the system is failing to boot and also failing to light the display.
Here's a link to a site with disassembly instructions for Toshiba laptops:

Most dead laptops (even those whose power supplies have been burned out by a nearby lightning strike with the system on 120 VAC power) will still have perfectly usable HDD module(s), and RAM memory cards, so that at the very least, these removable components may be recycled into memory reserves for your next laptop or sold ( to help defray the cost of a new system.

Dec 14, 2011 | Toshiba Satellite PC Laptops

1 Answer

When I turn on my laptop it turns on but the screen is not doesn't even light's completely black and off..what can I do for this??

Possible that LCD has failed or the linking flexible cord at the hinges have failed. You need to check this out bby checking and observing for any breaks. Also check the continuity. USe an external monitor to check on the laptop and if the display is seen and the PC works then the LCD/LCD driver IC migth be faulty.
You need to check on the mother board , the power supply to the LCD/Backlight circuit.

Aug 05, 2011 | Compaq Presario CQ50-215NR Notebook

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

2 Answers

My notebook does not start any more. don't know what to do. when turned on, green lights up in from switching on and thats about it. nothing else. i've checked memory and hard disc, seems to be fine. is...

Make sure there is nothing on the screen and there is no activity from the hard drive. Possible cause: 1. Memory failure.
2. Motherboard
3. CPU failure.

Possible troubleshooting steps and repair solution: Test the laptop with an external monitor and confirm that there is no video on the external screen.
If the laptop powers on to a blank black screen, check the laptop memory first. It’s very likely that you have memory related failure.
Try reconnecting the memory module, maybe it’s not making good contact with the slot.
Try moving the memory module into another slot, maybe the first slot failed.
If you have two memory modules installed in your laptop, remove them one by one. One of the memory modules could be bad (it’s very unlikely that both modules failed at the same time). Test the laptop with each module separately, try different slots.
If you have only one memory module installed, try replacing it with a new memory.
If reconnecting, replacing memory modules doesn’t help, most likely this is motherboard failure. Replace the motherboard.
CPU failures are very rare but it happens once in a while. From my experience, you can get one or two failed CPUs on a hundred failed motherboards.

Nov 08, 2009 | ASUS Eee 1000H Notebook

1 Answer

My dell vostro 1000 laptop's display ain

if i read this right, when you power up the laptop you get fan spin but no display ?, if you just get fan spin and the green power light and nothing else the you have a motherboard failure, if you get LED activity and it seems to be working but you only have no display the its more likely LCD failure, if you DO get activity try this : power off the system, press power button while holding down the D key, this will run the LCD BIST SELF TEST which will run through full colour screens if fails this test you will et a beep code, please bear in mind you will only be able to run that test if you get LED activity, if you dont have activity then the motherboard needs replacing

Oct 27, 2009 | Dell Vostro 1000 Mobile AMD Sempron...

1 Answer

My lap top will not turn on all the way. The little blue light on the bottom left turns on and then nothing happens. The screen is totally black. How can I fix it or is it broken?

If the orange "activity" light for the HD is not active at all, I would say it's either a HD failure or the ribbon that connects the HD has failed or come loose.

Jul 05, 2009 | HP Pavilion dv6000t Notebook

2 Answers

Won't start

sounds like a board related issue. if this were an lcd issue and the vga chip aint fried, then you should be able to power on a separate monitor by pluggin it into the external vga port usually on the side of the laptop. if you get picture and everything on the external monitor then you know you have a failed lcd or inverter. in the event that it does not get picture on the external and the laptop is still greenlit, you may find that there is a more serious problem with the board. i have seen this happen too often recently with overheating video chips. good luck


Jul 01, 2009 | Acer Aspire 9500 Notebook

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