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1) Go to Control Panel (Located on the start menu). 2) Then double click on Power Options. 3) The Power Options Properties window shall now open. 4) You will see a section called Settings for x power scheme, the x depends on which power scheme is enabled. 5) Click on the down arrow to the right of Turn off monitor: And set this to Never.
This should stop you monitor from powering off every 2 secs. If you need any further help just add a comment.
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Dim or dark display can be caused by a faulty inverter board or faulty CCFL lamp. The inverter supplies high voltage to the CCFL lamp, the CCFL lamp is a miniture fluro tube and these dim with age. Check out LCD Parts for service, parts and DIY info - click on this link to their WEB site. :- www.lcdparts.net
Check that the power cord is fully plugged in first.
It is probably the inverter board inside the monitor. (if the screen does properly display ever then it is not the screen) It CAN be fixed but I do not suggest anyone open up a monitor (LCD or CRT) who is not "technically inclined."
If you really want to fix this particular one then take it to a local tech and get an estimate first. If it's almost as much as a new monitor then buy a new one.