ASUS V6J GeForceGo 7400 + lcd monitor refresh rate question

hi all,

i have a V6J laptop with GeForce Go 7400 and an external 22 inch LCD monitor from samsung (analogue). When i switch the display to show on external monitor, my samsung display will constantly have horizontal lines going up and down the screen. It seems to be a refresh rate problem, but the refresh rate is at 60hz, which is the only option for most lcd monitors. the resolution is at optimal 1680x1050. It seems to be a driver problem but both the nvidia and samsung 2220wm drivers are installed. can someone please give me new idea as to how to fix this?

thanks,

 

Are you sure it's not a ground loop problem?

Search for "w3j ground loop" on this Asus forum, you will find an old thread with a lot of info. Maybe it's that and not the driver.

 

thanks, the problem seems to be the same. I dont see the flickering anymore after i switch the battery. However, when i plug in my ac adapter to other outlets i can still see the lines.

is this problem specific to notebooks only? desktop machine also use grounded power so i suppose it will also have the same problem?

 

It depends on the configuration and sensitivity of the devices.

I suggest:
- plugging the LCD in a different outlet (perhaps using an extension cord from a different room)
- 3 to 2 prong adapter (you lose ground connection though, can be dangerous to the equipment in some instances)
- plug the laptop and/or LCD into surge protection unit