How do I fix the LCD screen some times shows or just stays black but lights up just doesn't show anything?

It is fixed. Difficult to find the errors.

i think your device fall down, try ti disassmbely and unplug the LCD and plug again, this will solve the problem.

Shine a flashlight on the dark screen to see if you barelysee 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 beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout 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 correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally 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 lightand nothing shows on the external monitor, then most likely your video card isbad.

The monitor has failed, it is almost always cheaper to replace it than fix it.

m_v_schwartz, Best guess is problem with unit's "switch-mode-power-supply" / "CCFL inverter supply" has a bad "cold" or "frosty looking" solder joint (thermally intermittant solder connection) on the printed circuit board!!! Unit WILL NOT fix itself!! Only you or a qualified electronics technician will fix it. Use your warranty first if valid option!!!! See more of my responses to other LCD black screen symptom OWNERS that I have replied to in my fixya profile. Know and understand the "FLASHLIGHT TEST" that every LCD owner should know how to perform when "black screen" shows up. If this response steers you in right direction, please return to rate this response on fixya. FYI, Also visit web sites I have mentioned in the other responses in profile. Good luck with the repair. 12fixlouie

There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

Dead CCD.
Needs replacement.

Sounds like your backlight bulbs are wearing out.It is a common problem with Sony LCDs. Difficult to replace then.
Monitor Mike

just change your battery .......replace a new battery and see whether the problem is solved

how can u fix this black screen? the green power light is on, shows vista for a bit then turns black and stays black. any solutions or do i have to send it back?