Latitude C610 Display Problem

Inverter or backlight could be failing or shorting out.

I'd have a technician look at it or if you're comfortable crack it open yourself and have a look.

Sounds like you need to start with cookie clean out then check to see if processor fan is running. Check to make sure all your updates are installed and downloaded from microsoft. Make sure you have the latest virus updates with a good antivirus. Use Adware and spyware remover. You can't run on the net without this stuff protecting you anymore.

the most probable solution is that you need to check your inverter circuit. the backlight is just tiny florescent bulbs which could be good or bad.there can be no inbetween weath the lamp.
please get in touch if futher assistance is required