My laptop display becomes blank suddenly while working (the ac power adaptor is connected to laptop for charging)

This is strange.
I think your ac adapter power cord is bad. Get another one from ebay at: http://www.ebay.com

Just put in your computer's make and model, not the model of the battery in the ebay search.

For example: Toshiba Satellite Pro L300 AC Adapter

It might be your lcd screen's inverter, but it's strange. Anyway test the inverter by plugging in the ac adapter and when the screen goes blank try the steps below.

Shine a flashlight on the dark screen to see if you barely see the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your video card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works, then your screen is bad. If you see no icons by shinning the flash light and nothing shows on the external monitor, then most likely your video card is bad.

Either the AC port on the back of your laptop has a lose connection - if operation without battery is an issue, or if battery charge only is issue - then battery may have to be reseated or it is at end of life. Test by removing battery and running AC alone. if connection port is bad, laptop will power off immediately/unexpectedly. Good luck! btw - batteries for this unit are around $40 on ebay

It could be an AC adaptor issue.

It should boot when connected directly to the power outlet through the laptop adaptor. If it is not boot, then the adaptor might not be supplying the needed power to boot it up.

If it is possible, try to isolate the issue. Charge your new battery using another laptop. Then plug it in your laptop to see if it works. If it will work, then it is the AC adaptor of your laptop that is defective. If the charged battery still won't make the laptop boot, then there is something wrong with your laptop hardware. If could be a motherboard issue of your laptop.

Check your mains adapter plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced.

If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. I suggest you get a quote first.

Perform the following troubleshooting steps and check whether it helps;
1. Check whether the issue persists with all the tapes. If the issue persists with a particular tape, the issue is with the tape. change the tape. 2. Check whether the battery is fully charged, 3. If the batteruy is nit fully charged, connect the Camcorder to the wall outlet using the supplied AC adaptor. 4. Then, reset the Camcorder by pressing the RESET button using a sharp-pojnted object while it is turned ON.
5. If the issue still persists, remove the battery pacjk and disconnect the Camcoredr from the wall outlet; then slide the power switch to ON position for at least 30 seconds. Then reconnect the AC adaptor to the Camcorer after 1 minute.
If the issue still persists, service may be requuired. Please cointact ur Camcorder manufacturer to get it serviced.

Get a power charging adaptor from HP (if a smart adaptor) or a generic anywhere that matches your spec. Your device is doing what mine did, but in addition mine beeped softly as a warning of failure. Being a smart adaptor, I had to order one from HP, a generic won't work.

there is a chance of battery failure

as u said that when u plugged in the ac adaptor into the laptop it recognises that the ac adaptor is connected but it does not charge the laptop in this case what u can do is that if have the same charger extra then u can try with the another charger and if the other charger also does the same thing then in this case u need to replace the mmotherboard and if the other charger is working fine in this laptop then definately chage ur aac adaptor.....good luck...

thanks

From my experience with 3 DELL laptops, the problem was resolved by replacing the system board. Apparently the port the AC adaptor plugs into becomes damaged (provided you have determined it is not a battery needing replacemnet or a defective AC adaptor) and that cannot be fixed without replacing the whole system board.

sounds like you have an intermittent problem with your AC adaptor or dc input jack. Does the light on the AC adaptor light up when you plug it in? If it does then your dc input jack may be faulty. If the light on the ac adaptor does not light then replace the ac adaptor. Good Luck!