Displaying then after a few seconds black screen appears

If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.

If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.

If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Take it to a repair shop.

If your LCD TV or monitor has stopped working, or is displaying one of the following
symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can
examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life
of your monitor or TV by several years.
Take it to a repair shop.

its fried. too bad

To me this sounds like whats called "bad caps" problem. The capacitors in the PSU have gone out of tolerance and the back light is switching off. If this is the case you will need a workshop repair or if you know how to solder you could replace the capacitors in the PSU for the back light.

Unplug your unit then remove the back cover of your tv then observe the power supply look for bulge up or leaky capacitor if you see this capacitor replace them but observe the polarity. This bad capacitor cause your unit to malfunction, this capacitor produces a low and unfiltered dc supply. Try to check it first before you bring it to a repair shop good day and best regards.

It is only stays on for 2 seconds then your capacitors are bad. If it is only going out for a few seconds that it is probably auto refreshing.

Bad caps can look normal but can have high ESR, you also need to check the DC voltages. You can also have bad lamp assemblies, etc.
Make and model will help also, you can look for service manual here: www.elektrotanya.com

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Try to change the screen resolution and frequency setting of your graphic card.
1. Restart your PC
2. Before getting into splash screen, press F8 frequently
Choose enable VGA mode by pressing up arrow and press Enter, wait until finish loading. Now the display looks bigger, change the screen resolution to best fit to your Monitor (normally 1360X800). DO NOT CLICK OK>go to advance tab> Monitor tab, choose 60Hz for screen refresh rate, NOW you may KLIK OK