Question about ViewSonic VP230mb 23.1" LCD Monitor

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Vp230mb power supply

Hey, I read your post on fixya.com, I would like to know how to connect the external power supply to the monitor.

Thanks.

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Follow the ribbon cable from the pwr supply down to the motherboard. Near where it connects there are two "U" shaped wire loop test points. One is positive, one negative, 12V at 7.5amps.

Solder onto these. There is one other "S" wire which is for voltage sense. Don't know what to do with that one.

Inspite of all the wires in the ribbon, half are + and half are minus 12V, but it really needs the 7.5Amps.

Posted on Oct 30, 2008

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Acer 1721 17" flat screen


I suspect the power supply problem, that will be the first place to look.
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 ACER 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 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 pictures: 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.

May 09, 2011 | Acer AL1721 17" Flat Panel LCD Monitor

1 Answer

I have an Envision 7100 Monitor. Before going on vacation 2 weeks ago it was operating perfectly when connected to my Hewlett Packard PC. However, on my return the monitor screen remains blank (dark)...


The power supply may have become unstable due to bad DC filter caps, the power supply is always running 24/7 even when the power switch is OFF.
Look for bad cpas with domed tops.
If you are going to DIY and already try the monitor with another PC, 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 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 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 pictures: 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.

Mar 22, 2011 | Envision Computers & Internet

1 Answer

One of two Acer 24" desktop monitors would not


Yes, there is main AC fuse on the main power supply board. It may have blown fuse or bad caps with domed tops. It may be in safety shutdown mode due to shorted circuits.
If you are going to DIY and already try the monitor with another PC, 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 ACER 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 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.

Mar 04, 2011 | Acer AL2416WBSD 24" Monitor

1 Answer

Won't turn on. Started turning itself off intermittently and then quit altogether. Have replaced power supply cord but this did not remedy the problem.


More likley to have bad power supply due to bad caps, look for that first.
Please read my guide and learn about bad caps and failed monitors pictures.
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 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://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

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

Nov 10, 2010 | LaCie Photon20visionII 20.1" LCD Monitor

2 Answers

Syncmaster 226BW - screen started flickering this morning - now what?


Well, it may have dying power supply due to bad caps and it will more likely to go completely dead soon.
Please read my guide so you can decide if you will want to DIY repair or not.

Basic LCD monitor troubleshooting guide:

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

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

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

Oct 22, 2010 | Samsung Computers & Internet

1 Answer

Screen doesnt light up


Check the power 18~20vdc power supply output with and with out the inverter board attach, it can be shorted out inverter board or backlight inverter board, see boards here: http://www.shopjimmy.com/catalogsearch/result/index/?q=VP230MB&limit=15&stock=all

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

Aug 31, 2010 | ViewSonic VP230mb 23.1" LCD Monitor

1 Answer

We understand that your problem is: Hi I have a ViewSonic Viewpanel Vp230mb and I am having this issue as to when I turn it on it will only stay on for a couple of days at a time and then will just shut...


90% failure in LCD monitors are due to bad DC filter caps in the power supply as you can see in my albums.
http://s807.photobucket.com/home/budm/allalbums
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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, 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 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.
http://en.wikipedia.org/wiki/Capacitor_plague

Aug 12, 2010 | ViewSonic VP230mb 23.1" LCD Monitor

1 Answer

I just bought a used Mitsubishi-NEC V71LCD monitor. After connecting the power cord, and the video cord, I powered the monitor up. It had a video display for about two seconds, and then went black. I reset...


dhowie, Monitor will need work done to internal "switch-mode-power-supply"/"CCFL inverter supply board. possible bad electrolytic filter capacitors or thermally intermittant component soldering on printed citcuit board. Your CCFL back-lit LCD display no different than any other brand in it's basic design and operation. Spend an hour in my fixya profile reading about black screen and blank n black screen stuff. Then you will know what you will do or not do to solve V71LCD problem. Follow the links to other sites for more info here on fixya and elsewhere. I will check for response from you at this same posting later.
12fixlouie

Mar 11, 2010 | Dell E152FPb 15" TFT LCD Flat Panel...

1 Answer

Power cuts out


Plase check your power supply. I think you have a loose connection somewhere. Please check all connections including the place you plug into the wall.

This trouble could be internal to the monitor ... but I think your trouble is external.

Thanks for the clarification and thanks for visiting fixya.com

a

Oct 25, 2009 | ViewSonic VG920 19" LCD Monitor

1 Answer

No power did not work out of the box


I'm looking to get a power supply for a VP230mb lcd.
I'm in chicago and would like to install it myself.
Unless someone can recommned a reasonable local repair shop

Dec 20, 2007 | ViewSonic VP230mb 23.1" LCD Monitor

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