Well i was on the laptop with an ac cord and out of no where the backlight on the screen turned off so i ttying shutting it down and hasnt been able to turn on sense and the power light wont light up at all so im hoping its the cord but i dont know why the backlight turned off
Are there any noises like its attempting to start up? Any beeping, fans running?
If there are and the activitity lights are flashing, but just the monitor is off, than I would definatly say there is probably a bad connection between the motherboard, and monitor.
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Graphics chip may have failed. If screen is white there is no information being sent to the screen, but the backlight is working fine. The Graphics chip may not be replaced, but the motherboard replacement is the usual fix for this issue. There may also be a loose cable beneath the case above the keyboard, which connects the screen to the motherboard.
You turned on your laptop and horrors upon horrors, the
screen is BLACK! You see that the laptop has power but besides that nothing is
happening.
I want you to know that there is a very good chance you can
get out of this situation quickly and without any cost. This fix works on all
brands of laptops:
• 1) TAKE OUT YOUR LAPTOP BATTERY
• 2) REMOVE YOUR AC ADAPTOR CORD, that's the wall power, remove it.
• 3) NOW HOLD DOWN THE POWER BUTTON FOR 30 SECONDS
That will drain any static electricity that has built up on
your laptop system board and many times fixes the problem of a black screen.
After the 30 seconds re-connect your laptop to the wall
power and hit the power button normally and see if the laptop comes back up.
Replace your battery.
or if wont start
Here are the fix steps:
1. Turn off your computer
2. Disconnect every wire from it
(including power)
3. Disconnect the battery from
the bottom of the computer.
There will be two tabs labeled 1
and 2.
4. Re-plug in the power wire.
(the battery should not be in the computer)
5. Turn on the power. The screen
will work. Choose start windows normally. (if you get that screen)
6. Go to Control Panel ->
(Mobile PC) -> Power Options -> Under Balanced choose change plan
settings
7. Choose Change advanced power
settings
8. Find Processor power
management and change the minimum processor state from 5% to 100% for each On
battery and Plugged in.
9. Click Apply then OK
10. Shut down you computer.
11. Disconnect the power cord.
12. Re-install the battery on
the bottom of the laptop, plug in the power cord, and restart the computer.
Your not getting power? When you plug the laptop in does the Battery charge light come on? Are you getting power to the laptop? Do you have a multimeter to verify voltage from th AC outlet to the AC jack? Or ,the power gets to the laptop and push the on/off button you get no response? Or, you push the on/off button and the laptop starts then shut down? No lights, no leds blink. Remove battery, Try another cord/charger. Has it been dropped or damaged that would jar loose a connection, or pulled by the cord resulting in a damaged AC jack?
It sounds like a loose connection in the charger cord or the AC jack. If the laptop is pulled by the cord it could have loosened/damaged the AC jack. If you remove the battery and only use the AC cord does the problem change? if you only use the battery and no AC cord does that change the problem? When Power is removed, without a proper shut down, the machine sees it as a crash therefore the disk check and black screen with boot options.
Remove the AC power (charger) and then take the battery out. Plug in just the AC power supply and turn the laptop on, see if it boots up and shows a display on-screen. If it boots let it boot up and then shut it down as normal. Reinsert the battery and try as normal. If you still get a blank screen can you then tell me if you get any post (splash) information like the Compaq Presario logo before it goes blank.
shut down computer - unplug power cord from laptop - remove the battery from laptop - plug Ac adapter into computer and Ac outlet (wall)
turn on computer
if computer does not turn on, replace the AC adapter and cord - then place battery back into computer
plug in new Ac adapter and cord - recharge battery - if orange light stays on after 4-6 hours of charging battery, you need new battery as well - replace battery, charge it up and it should be fine
if you have attempted these steps before and no change occurs, then you may have issue with power connection in computer - locate a service centre to replace power connection on computer
remove the battery and the power from the laptop.....then press and hold down the power button for 20 seconds ...... attach the AC power only and turn on the laptop this should turn on the system. This drains the capacitors on the system (safety feature of laptops ... quite common)
If this does not work remove the Ram and reseat it ... something has either come loose or the backlight on the LCD has gone bad.
The lid actuator switch may not be working correctly. It's a small switch above the keyboard and led's on either the right or left side. Try pressing it 2 or 3 times to see if the display starts working correctly again. If so, it will need to be replaced.
If that doesn't work, you can also turn it on with the ac adapter plugged in. After it boots, press the power button and hold it in until it shuts off and then turn it on again and see if the display has returned to normal.
If neither of these options work, your laptop may need to have the backlight replaced.
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