Dell E152FP monitor after startup or coming back from standby the screen will show up and 5 seconds later it disappears. I turn off the monitor and turn it back on. The image comes back again but it disappear five seconds later. This repeats around 5 times until it stops. what's wrong. the monitor? or the videocard

http://support.dell.com/support/edocs/monitors/1901FP/en/controls.htm
Go here and look at how to disable the OSD lock; try holding the menu key for 15 seconds on the monitor.

The dialog box you are seeing means that the monitor is not receiving a signal from the computer.

check your cable going from the monitor to the computer. if the cable seems ok, hold the power button on your towerr until it turns off, then wait 5 seconds and push the computer power button again.

Cheers

It sounds like the DELL Capslock indicator. It is a light blue square with a lock on it and a capitol A under the hasp. You may have a bad keyboard key. switch out keyboards and see what happens.
Good luck,
James.
If this was a help, PLEASE click on 4 thumbs up!!

Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed Dell monitors to get some ideas what goes wrong: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further.

Ok, another words, monitor powers up for few seconds and shuts down by itself. If green LED on the front panel turns off as well or stays on?
If stays on, then inverter turns into protection mode because of old backlight lamps.
If it turns off in same time with an image on the screen, then there are some bad electrolytic capacitors in the power supply.

Hello,

We have a dis-assebly and repair guide posted on our web site at:
www.ccl-la.com/monitor_repair.htm
The problem is usually the driver transistors, our guide shows where they are and what to replace to get your monitor back running again.

I hope this helps, If so please rate my solution.

Buddy
Corporate Computer
www.ccl-la.com

My bet is that your monitor is on it's way out. If this is true, it will get worse until it gets to a point where it no longer works at all. Connecting the monitor to another computer should confirm my suspicion. The monitor has probably developed a problem with some capacitors inside. The parts are not expensive, but finding a shop to do the work at all may be a challenge. If you're handy with a soldering iron you might want to have a try at it.

The On Screen Display (OSD) is Locked

http://support.dell.com/support/edocs/monitors/E152FP/En/controls.htm

All buttons can be locked or unlocked when the 'Menu' button is pushed and held for over 15 seconds.

All buttons can be locked or unlocked when the 'Menu' button is pushed and held for over 15 seconds.

If you open the monitor up, on the inverter board is a 1000uF 16v capacitor that goes bad. If you replace that it should fix the problem. Look at the top of all the capacitors and you should see one that's popped up on the top, that would be the bad one. Some soldering is required. Make sure you put the negative white stripe on the white side of the silk screen on the board! Its a simple fix just sounds difficult.