LCD FAILURE My viewsonic lcd manufactured on 2007-9-17 failed to start this morning, i replaced its power cord then it didnt work!!! i m tried of callin their serivce center none replied. i have an a warranty period of three yrs, among which hardly two months are remaing to claim it. PLz reply quickly

ViewSonic LCD (VA1912w) Went Blank

I am using this great LCD for about an year. But few times in the past my LCD didnt show up the display though the Green light was still ON, turning off the LCD and opening it again always solved the problem. But now My LCD completely went blank. Turning off/on didnt work at all now. I've tried couple of other tweaks mentioned on this site but they didnt work. I am just seeing a blank screen with green light ON. and ya theres a very low hissing sound coming from the LCD.

I take it you are talking about the monitor menus. If this is the case, suspect a bad monitor. Try another monitor to see if it works. That will tell you for sure.

It uses the same power cord as your PC, NEMA5-15P to IEC C13,
User manual:
http://www.viewsonic.com/assets/027/7939.pdf

It may have problem inside. See failed VIEWSONIC in my albums.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Look for bad caps just like all the failed VIEWSONIC VX series as shown in my albums.

Basic LCD monitor and LCD TV troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV, Monitors, Caps : http://s807.photobucket.com/home/budm/allalbums

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitor kits: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Please post back what you find.

It uses the same power cord as used for your PC, try that.
LCD monitors do ahev a lot of problem with power supply and back light ineverter circutis if they are more than 2 years old.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

Optiquest is the Viewsonic low end products. You can take it apart and look inside.
Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, falied 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 monitors to get some ideas what goes wrong: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further.

The problem you have sounds like the inverter board has failed it can be repaired by replacing the inverter board which may be a cheaper option than buying a whole new monitor, you can do a search online for lcd repairs and spares to find the part you looking just state your make and model and price one up.

But before you do do that, and you feel confident that you could take the back cover off the monitor, you could have a look for blown capacitors, they are quite a comman fault in lcd monitors, once the back cover is off check the power supply board, it will be where the power cord plugs into the monitor, The capaciters are barrel like in shape with silver tops, check for any leakage from them or on the board surrounding the capacitors, also make sure they are fully flat at the top, if they are slightly domed or pretruded they will need to changed. post back your findings if you do find any bad caps ill will try to explain how to get the right ones and what do to. cheers.

This failure might not be in the power cord but the internal power supply. If your LCD is older then 15-18 months for sure it needs a power supply replacement.
Symptons of a failing power supply are:
1- Set does not powers ON.
2- Turns OFF by itself.
3- Needs to be unplug to make it powers ON again.
4- When the set is ON, it produces a humming noise through the speakers.

You can find a power supply replacement visiting this website and you should be able to replace it yourself.

ViewSonic LCD (VA1912w) Went Blank

I am using this great LCD for about an year. But few times in the past my LCD didnt show up the display though the Green light was still ON, turning off the LCD and opening it again always solved the problem. But now My LCD completely went blank. Turning off/on didnt work at all now. I've tried couple of other tweaks mentioned on this site but they didnt work. I am just seeing a blank screen with green light ON. and ya theres a very low hissing sound coming from the LCD.

Replace q7 on back of boad also ic2 also the cap,