I turn on my dell and the lights above the keys flash from side to side like it is going to power up but then the screen stays blank and you hear a reverb/clicking noise come from the computer speakers. any ideas on what type of problem i am having?

1. Restart the computer.
2. As the computer boots, press <F12>
3. when the Dell Splash Screen appears.
4. At the One Time Boot menu, press the <Down> arrow key to highlight Diagnostics and press <enter>
5. A graphical menu listing all discovered devices in the system is now displayed and the express diagnostics should run (Takes about 4 minutes).

This will test the hardware on your computer.
I am thinking it could be the battery but this is just to be sure.

Try this to see if can give us some codes with it's on board diagnostics. Hold down the function button of your laptop and then the power button while still holding down the Fn/Function button on the left side of the keyboard. See if this gives you either an error message on your screen or, flashing lights above your keyboard. Pay attention, write down what lights where lit up what ones flashed, etc. This is to diagnose if the LCD isn't working. Comment back if you get either the light code or the error code on the screen. IF nothing happens try holding the Fn/Function button on the left side of keyboard and holding the F4 button, see if that makes any lights flash above your keyboard.

Since it sounds like an issue with the Power first try to release flea power.Disconnect the charger,remove battery,press and hold down the power button for 30 seconds.Reconnect the battery and charger.Turn on system and check if it turns on. For further help please check Dell Inspiron 1525 Manual. Also confirm if the light on the charger stays on,when connected to the system.

Is the laptop really turning itself off, or is the display just not doing anything?

It sounds like it could be a problem with the nVidia GPU used on the D620.

Dell has extended the warranty on the nVidia GPUs by 1 year. Call Dell and describe the problem.

See also: Dell and nVidia GPU

Your tv screen has problems with the video mode
that has setted up on your ps3, hold the power button till hear two beeps, this will reset the video mode of the ps3, and leavse you at a screen to set up the video mode of the ps3.

Succes.

Make sure you set up your laptop to display to a second screen. Depending on your Operating system, go to your display properties and go to the settings tab. Then click on the second monitor and enable it.

most likely the laptop presentation mode is on. press the Fn key and the F5 key together (maybe several times) to take it out of that mode.

From your description your backlight is going out. The fluorescent light when it begins to burn out tries to draw too much power. Your inverter is sensing this 'too much' power draw and shuts down power to the back light. Replacing the backlight is the most technically difficult repair of an LCD, and most repair shops don't even offer this service. I recommend that you sell your LCD 'AS IS' on eBay or a similar website. The Power board and the Control Board are both usable parts that can be easily salvaged from most Dell Ultrasharp monitors.

try to start your pc in safemode with vga mode with thjis faulty monitor
hope you know how to do it
start pc (powerr on)
then continuously press F8 key then it will show you boot menu
select safemode with command prompt
then if it show desktop on screen this means your monitor is having problem with resolution try to downgrade your monitor's resolution
rightclik on desktopgo to properties
select settings
here you can find screen resolution make it to 800X 600 just for one time
then restart your pc it will auto select proper screen resolution

I think u need to updrage ur bios and RE-INSTALL UR WINDOWS