Monitor works for about 30 mins then goes blank with a messahe reading 'Not Optimum'

have you tried testing the screen on other pc if it wotks or the same effect? if you tried it on other pc and the result is the same, the screen or monitor is faulty,and needs repair or replacement, but if it works on other pc's, your pc have the problems. it could be the memory module, video card, or the motherboard or processor. also, try checking the settings, maybe you have set it to auto-off after 30 mins or so.

Have you check screen power down could be it is setup to shut down as you say after 10 mins. Access power through control panel, change settings ie to 30 mins
Fingers Crossed>?

right click on your desktop.go to properties.then go to the screen saver tab.click on screen saver tab.then you will see call monitor power.click on the power icon.go to the settings forr home/office desk power scheme.there you will see a setting called (turn off monitor)change that.let me know if it did work hay.

OK. IN XP GO TO DEVICE MANAGER AND CLICK ON THE MONITER AND UPDATE THE DRIVERS.IF IT TELLS YOU IT CAN NOT FIND A BETTER DRIVER UNINSTALL..REBOOT AND DOWNLOAD NEW DRIVERS FROM CO. WEB SITE.RICHARDM69

There are a few things you need to check here.
1. It could be that your computer power management is set to turn your monitor and harddrive off after 30 to 45 min.

If the computer is however working for 30 to 45 min while you doing stuff and it shuts off, the there is an internal problem "Hardware"

I would suggest you check to see if the power management is set to turn off monitor 30 min and harddrive after 45 min. IF that is not so, then we go on to the next test.

It could possibly be your processor fan is not working so once your processor gets over heated it shuts off the computer.

Turn off the computer, remove the case "this is only if you know what you are doing" with the case off, power on the computer and see if the processor fan is working.

You can get back to me and I can walk you through it.

Hope thiss help.

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"Not Optimum Mode 1280x1024 60Hz"
- The monitor turns on but turns off by itself, the LED blinks green.
- If you detach from the PC points to "control cable" the picture runs continuously in the vertical direction or presents while line , and
as soon as it is reconnected, the monitor goes off.
- The monitor does not turns on and dont dispaly anything, the LED blinks green-lit, if you detach from pc points to "control cable".
- The monitor turns on, works well some time, but after a window apiers "Not optimum mode. Mode recommended 1280X1024 60Hz"
- The monitor turns on, works well only with low resolution 800x600, when try to change a window that reads "Not optimum mode. Mode
recommended 1280X1024 60Hz"

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Have you checked your energy saving settings? Try to set the monitor to "always on" and verfy if the problem still persists.
Also check if your monitor drivers have their own energysaving options, although i doubt it.

screen has about 12 small opening page instead of a normal one page

your problem is the LCD..have it changed already...it works mostly

http://www.electronicrepairguide.com/dell-e173fpb-lcd-monitor-repair.html