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Screen won't appear upon start up and I get 3 beeps but no screen

My screen started to dim last evening, I turned off the computer and now it the screen not light up or appear. The computer makes three beeps and nothing happens. Is it completely dead?

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  • Acer Master
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What you are hearing is a beep code, if its 3 short beeps then its the memory which has developed a fault and it may need to be replaced

Posted on Nov 16, 2008

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Geekman
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SOURCE: Screen won't appear upon start up and I get 3 beeps but no screen

3 beeps POST code (power on self test) means RAM problem.
Reseat the RAM module/s and boot up your computer.
If you have two RAM modules, remove them both and insert one at a time to test them, to determine which module is faulty.
If it still doesn't work then replace the RAM module/s

Posted on Apr 02, 2009

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I have lenovo g550...my screen flickers in every 5minutes...


Failing Inverter An inverter, typically found inside a laptop computer, consists of a small board, which has impregnated electronic circuits stamped on it. Inverters look like thin boards about the of two sticks of chewing gum. The inverter and its bulb control the intensity of the liquid crystal display, which lights the screen monitor. The computer can control the output voltage of the inverter and either lighten or darken the screen. A special type of inverter can adjust the brightness of the screen by using an internal sensor to judge the room brightness, and then adjust the screen accordingly. Failing inverters give off some specific warning signs, which can be recognized by observing different screen characteristics.

Short Intermittent Display Upon turning on the laptop, the screen flashes on in the normal mode for a short period and then blinks to black. A very faint image appears in a dark background, which will be very hard to see almost invisible. After shutting off the laptop and restarting, the same mode occurs, where the screen appears normal for a few seconds then fades to black. This condition points to a failed inverter. To confirm this, plug in an operational external monitor; if the external monitor functions, the inverter has failed. b> Total Blackout with Ghost image b> The laptop turns on, as indicated by the power supply button, but the screen comes up black. The screen comes up black after restart. You might be able to detect a very dim or ghost-like image on the monitor. When you plug in a known functioning external monitor, the external monitor operates normally. This mode of display indicates a failed inverter. b> Long Term Periodic Operation b> With this failure mode, the laptop screen illuminates normally upon start-up and remains that way after several minutes, hours or even days, until it goes very dark again. Brightness controls or restoration attempts do not work. Most often, the screen will function normally with a computer restart, but will eventually return to black. Faint ghost images might appear, as seen in the total blackout mode. b> Dark With Color Variation b> Upon computer start-up, the monitor shows black or dark gray, accompanied by very faint images. The screen might have an intermittent color change, or remain on with a non-standard color variation, like pink or red. b> Auto Control Switch b> If the screen appears black, with no faint or ghost images, look for the lid switch near the back hinge. The switch, when depressed with a closed lid, shuts off the computer and monitor functions. Sometimes the switch becomes stuck in the closed position, disallowing the computer and monitor to turn on when opened. Pushing the switch manually several times can often free it up. If the switch tab has broken or jammed inside the case, it needs replacing. b> Loose Connection In this mode, the display looks normal upon start-up, but tapping the side case of the computer turns the screen black. More tapping results in the screen functioning normally then cutting out again. This condition points to a loose wire connection from the inverter to the LCD backlight lamp, or the video cable. The connectors can be accessed by removing the monitor bezel screws and pulling the plastic retainer off. Both connectors can be cleaned and refitted.

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I cant start my laptop . when i press start i gives beep sound twice and blanck screen


Sub out the ram one at a time and power up each time, if you are lucky! the machine will start up, if not! remove the main battery and try again. If no change! the motherboard is the problem and you will need somebody to take it to the next level and find out the cause.

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Return the laptop to the place of purchase because you still have warranty coverage, any tampering will void warranty.

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Try running the last known good configuration.

Follow the steps below,

Step 1: Shut down your PC completely.
Step 2: Turn on the Power button.
Step 3: As soon as you turn it on start hitting the F8 key on your keyboard until you get to a black screen called "Windows Advanced option". (If you don't get to that that screen but you end up reaching the blue screen than that means you have delayed in hitting the F8 key. start again from step 1.)
Step 4: As soon as you reach "Windows Advanced option" use your down arrow keys to choose an option called "Last know good configuration".
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When I turn it on I get three beeps and nothing else


Hi,

The 3 beeps are correct diagnosis for the screen problems.

reboot, keep tapping F8, till you get to
the start up screen ( black dos screen )

Try the last known good first at the top, let it roll.

If this fails, try safe mode, let it boot up, then try a system restore,
start,all progz, accessories,system tools,system restore, try go back in time.

If you cannot get into the "black" start up screen at all, your video card, has failed.

because you should get minimum of VGA graphics in safe mode.

if you do, then the video driver is corrupted and needs updating

Regards
Richard.


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You could have a defective screen, either a faulty inverter or a CCFL lamp - follow this to determine the fault.

Defective CCFL backlight, it may have the following symptom:
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  • Picture flickering with dim display.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

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Screen won't appear upon start up and I get 3 beeps but no screen


3 beeps POST code (power on self test) means RAM problem.
Reseat the RAM module/s and boot up your computer.
If you have two RAM modules, remove them both and insert one at a time to test them, to determine which module is faulty.
If it still doesn't work then replace the RAM module/s

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This will not kill your computer don't worry.
What would be mt suggestion for you, please get your presario v5000 reimage with all the drivers.

Thanks

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