Dell inspiron 6400 display goes off < 1 min after switch on time

when your computer restart pre del or f1 f2 it open the bios

you need to follow this steps:
on the desktop right mouse click on it , should appear a menu, chose properties and then screen saver, on that screen chose power then just tick the option to see the battery metter

Run the LCD BIST Test

http://support.dell.com/support/topics/global.aspx/support/dsn/document?c=us&cs=04&l=en&s=bsd&dn=1092705

If it passes, replace the motherboard, fails replace the LCD

RUN CHECK DISK AND IF IT STILL WONT BOOT RESTART AND BEFOR THE WINDOWS LOGO COMES ON PRESS F8 AND CHECK START IN SAFE MODE THEN RUN CHECK DISK

do a system restore before it started doing it.

it sounds like your display backlight has gone bad. If your handy you can get a new display. If you are really good you can replace the back light.

This could be a faulty video cable or connector or CCFL lamp or inverter.
Try reseating the video cable/connector that connects to the motherboard first.
If this doesn't work then to determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. 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 the monitor up first then the laptop, 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.

This is a no boot issue. Youre saying that you can perfectly run the PSA diagnostics but doesnt load Windows rather it stays on black screen, meaning the boot loader of Windows failed to load. You need to reinstall windows on your computer

Hi my inspiron 6400 cannot boot up after trying several time .I press switch on, then after 3 second it goes off again.Battery fully charge.
1)battery new
2)rep used mother board
3)rep touch pad
4)rep keyboard
I hope anyone that know this fault .Kindly help me with the issue.

Hi,

Try to turn on the system with the charger plugged in and also how old is the system.if the system less than a year then try to get the battery changed and may be the motherboard.