With it doing what you said it sounds to me like there are 3 possibilities-some caps on power supply are bad and need changing, the bulbs are bad and need to be changed or your inverter for your bulbs are bad and needs to be repaired
G'day Dave Have you tried the monitor on another computer? If it exhibits the same problem on the other computer then you will need a new monitor. Then try a friends monitor on your computer. If you want to be really sure about the state of your monitor, and if the lead between the monitor and the computer is removeable (some monitors have hard-wired leads which plug into the graphics port on the back of your computer) try replacing that lead with another lead. (borrow a friends monitor lead?) LCD monitors are very cheap these days and the cost of repairs to your monitor can be prohibitive taking into account the cost of a new monitor. If your monitor (and connecting cable) is fine on another computer, you may have an issue with the graphics card inside your computer, which is inserted into a dedicated slot on the motherboard. Depending on your computers motherboard, it may not have a separate graphics card inserted into the motherboard, and the graphics may in fact originate from a dedicated graphics chip soldered onboard the motherboard. In that case (ie you have a dedicated chip) you may have to replace the motherboard. Dont forget to check all cables before deciding on purchasing anything new. if you are not comfortable doing what I have described, use a computer geek friend or spend some some cash and have a reputable computer shop have a look at the problem.
See here: http://en.wikipedia.org/wiki/Video_card http://en.wikipedia.org/wiki/Graphics_processing_unit http://www.acs.edu.au/info/computers/graphics/video-cards.aspx
Answers & Comments
With it doing what you said it sounds to me like there are 3 possibilities-some caps on power supply are bad and need changing, the bulbs are bad and need to be changed or your inverter for your bulbs are bad and needs to be repaired
G'day Dave
Have you tried the monitor on another computer?
If it exhibits the same problem on the other computer then you will need a new monitor. Then try a friends monitor on your computer.
If you want to be really sure about the state of your monitor, and if the lead between the monitor and the computer is removeable (some monitors have hard-wired leads which plug into the graphics port on the back of your computer) try replacing that lead with another lead. (borrow a friends monitor lead?) LCD monitors are very cheap these days and the cost of repairs to your monitor can be prohibitive taking into account the cost of a new monitor.
If your monitor (and connecting cable) is fine on another computer, you may have an issue with the graphics card inside your computer, which is inserted into a dedicated slot on the motherboard. Depending on your computers motherboard, it may not have a separate graphics card inserted into the motherboard, and the graphics may in fact originate from a dedicated graphics chip soldered onboard the motherboard. In that case (ie you have a dedicated chip) you may have to replace the motherboard. Dont forget to check all cables before deciding on purchasing anything new.
if you are not comfortable doing what I have described, use a computer geek friend or spend some some cash and have a reputable computer shop have a look at the problem.
See here:
http://en.wikipedia.org/wiki/Video_card
http://en.wikipedia.org/wiki/Graphics_processing_unit
http://www.acs.edu.au/info/computers/graphics/video-cards.aspx