How to remove back panel on samsung 931b - Samsung SyncMaster 931B 19" LCD Monitor

If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

If you are lucky hope that it is still under warranty and RMA, I hade the same problem but with an HP. seems to be a common theme.

You need to open it up and look for caps with bulging tops. Common problem with ALL brand of monitors.
http://s807.photobucket.com/home/budm/allalbums

http://www.axtsystems.com/index.php?option=com_content&view=article&id=83:samsung931bfix&catid=48:fixingstuff&Itemid=81

Please post back what you find so it will help other people also. Use good caps, PANASONIC FM or FC series from DIGIKEY.

More likely to be bad caps with bulging top or leaking liquid in the power supply for monitor this age, you need to open it up and inspect the caps first, post back what you see so we can guide you further, see example of faile SAMSUNG monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

This model was released in 2001, you need to open it up and look for bad caps with bulging top first, the problem can also be in the backlight inverter circuits. Post back what you see so we can guide you further, see example of failed SAMSUNG monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

First palce to check will be the power supply section, look for bad caps (bulging tops), post back what you find inside so we can guide you further, see example of failed SAMSUNG monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

Power Supply Defective, please send to repair store.

I have the same monitor, and twice I've experienced this exact problem. In my case, the video connectors have relaxed. If I wiggle the cable, I can make it better or worse, so it's time to disconnect, reseat. I don't know if it will work for you, but it's free!

take a soft cloth (type used for cleaning glasses) and moisten it with a small amount of water on one corner.

gently wipe the wet portion of the cloth across the screen (if you have any weak alcohol based cleaners you can try it. I have used hand sanitizer before on my 931b w/out problems, I wouldn't use any extremely strong liquid cleaners though).

Use the dry part of the cloth to wipe the area dry, then move to another part of the monitor once you are satisfied.

Open the case, remove the power board and visually look for bulging caps. I replaced 3 on mine and now its prefect.