Viewsonic VX1935wm. Power lite does not come on. Replaced 4 bulging caps on the power supply board but it still does not come on. (No power-on LED).Power supply voltage is good. Any ideas as to what to look for??

The problem is in the power supply inverter board, usually caused by bad capacitors, suggest a professional.

Did you replace the whole power supply/inverter board assembly with a new or used one? Caps and voltages (5v and 12 or 18v are OK?
http://lcdalternatives.auctivacommerce.com/Search.aspx?k=vx1935

Send me e-mail for the service manuals (there are two versions), [email protected]

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
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

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.
Please leave rating if it helps.

You will have to open it up and inspect the main AC fuse first, also need to look for bad caps with bulging/leaking tops-bottom.
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 VIEWSONIC VX series monitors to get some ideas what to look for: http://s807.photobucket.com/albums/yy352/budm/
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://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.

That can be as simple as failed DC filter caps in the power supply, that will be the first thing to check, as you can see in my albums of failed VIEWSONIC and ALL brands of monitors.

Basic LCD monitor troubleshooting guide:

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

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

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.

Your power supply probably has a blow electrolytic cap on it.

You need to pull the power supply board out and have someone replace the electrolytic caps on it. Believe me....if the one for the brightness is bad...they are all suspect!

Caps are cheap...but knowing how to open the monitor and do the soldering is the part that takes some skill and may be costly.

Good luck and be careful.

Hi...there,

It's seems you got a busted backlight inverter. Need to replaced a new inverter...

ok.
#1. replaced capacitors on power board. DM board FMT board .
# 2 on power board you need to chek caps. 3300mf x 35 v.QTY 2.
# 3 12 capacitor 1000mf x 16 v.
If caps 1000mf x 16 v . looked good. replaced anyway......

A lot of TVs are having their power boards go bad due to a poor brand of capacitor (CapXon usually).

If small problems are noticed with the tv, the solution is to replace the capacitors. However, once the TV gets to the point where there is no power at all any more (not even a stand-by light) then the power supply has to be replaced.

Visit Viewsonic's website or call your local Viewsonic repair shop to get a price on this board. They are usually under $100.

Having the same problem, storm the night before? Mabye lighting