Shows picture then goes black - Insignia 37" LCD Flat-Panel HDTV

The show you are attempting watch is being broadcast or streamed at a resolution and/or refresh rate that your television will not support. It goes to black screen to protect the horizontal and vertical circuits from damage, after a certain number of attempted resets, it will display the unsupported mode until you change away from that broadcast or stream.

Periods.......Nice little items because they denote the End of a sentence.
See how this works?

"I have a vgn cs36gj, I was working with it, suddenly the LCD became pale black, I connected it to external monitor and it has a picture, sometimes after turning on for 30 minutes LCD start working normally, but after turning off and disconnecting power when I turn it on, it only shows a pale black picture, you know it is on but only black!"

Now you try it.........

"I have a vgn cs36gj. I was working with it, suddenly the LCD became pale black.
I connected it to external monitor and it has a picture."

Okay, I got that part.........

"sometimes after turning on for 30 minutes LCD start working normally, but after turning off and disconnecting power when I turn it on, it only shows a pale black picture, you know it is on but only black!"

WHICH LCD?
Laptop LCD?
External monitor LCD?
Man on the moon LCD?

1) If the external monitor LCD goes 'pale black', the problem is the graphics chipset.
This I do not believe

2) If the laptop LCD goes pale black, this I believe.

Post back in a Comment.

Regards,
joecoolvette

clean the crt socket if your tv is using a picture tube

Issues with back light:
Please do not attempt to diagnose if no competent.
Do at your own risk.
Check for 24 Volts power to the inverter board
No Power---Check Power Supply
Power Present---
Verify status voltage 3v to 5v on inverter board harness (plug)
Replace Inverter Board

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. Look for 5vdc, 12vdc, and 24dvc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

yes humidity has been known to make the panel seperate. I live in south tx and work for sony, alot of panels that show that prob is usually the panel seperating. wouldnt recomend to fix to costly around 85% the cost of when you bought it.

Try shining a flashlight on the screen, or without the flashlight, try to see if you can distinguish anything on the screen at all, if you do, the backlight is dead, or the monitor has an internal most likely unfixable problem.

it shows pictures.. as an advertisement.. it means its loading.. it freezes sometimes because of the connection.. and it shows black screen bec. of the connection too.. if it goes black again,., try reconnecting it...

after i take a picture on my nikon coolpix the screen goes black for about 30 seconds before you can take another picture.