Question about ViewSonic VG150 15" LCD Monitor

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VG150 power switch defunct

I have inherited a VG150 and it has a dead power switch. How do I open the case to replace the switch? I plan to install a cheap switch from Radio Shack doing a bit of soldering and gluing something over the hole where the original switch was. I undid all the screws but can't get the case apart. I don't want to risk breaking it. How do I open the case?

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Re: VG150 power switch defunct

There are tabs along the sides so you need to remove all screws and then use something like a screwdriver to pry it open... careful not to scuff the plastic. Anyhow the switch is probably fine and your main board is dead. There are several posts on the web about this issue, and mine had the same problem. Once I replaced the main board I found on ebay, it worked just fine.

Posted on Aug 18, 2007

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Interference viewsonic vg150

check the VGA connector and fix it the connection

Oct 03, 2010 | ViewSonic VG150 15" LCD Monitor

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My LCD monitor doesnot power on. There is a problem in the power circuitry and is there a replacement part for this. Part model no. written on the board is: FM-20A02/AAA/AAB

Check if there any deformed capacitor on the board.. normally this is the cause of the problem...of cause, make sure the fius is not open.

May 24, 2010 | ViewSonic VG150 15" LCD Monitor

1 Answer

"failure of "cold-cathode-fluorescent-lamp"

they can be repaired by an electronic tech but are cheaper buying a new one. The cost of new inverters range from 30-80$ USD. Viewsonics don't cost that much and now you can get 18.5 inch widw screen acer or other brand lcds for 89$.

i woudl really suggest just buying anew unit.

Feb 14, 2010 | ViewSonic VG150 15" LCD Monitor

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I have a viewsonic vg150 and the led on the board is lighting but the power don't come on what could be the problem.

greg_olive, Possible failure of "cold-cathode-fluorescent-lamp" power supply called INVERTER CIRCUIT inside of monitor. If "lay on floor" black brick "switch-mode-power-supply" detects fault with CCFL inverter it will go into full or partial "shutdown" mode to try and save itself from having a catastrophic, nonrecoverable failure. e.g. sparks, smoke. fire. A tech will need to investigate it. Your monitor no different than any other CCFL backlit LCD brand in it's basic operating principle!!! Read more of my and other techs FIXYA profiles for more info and options that are open to you as a consumer/user of lcd monitors. Black, or black and blank is you're and thousand's of other users symptom. If pocket is deep enough, take the easy way out! Trade for new! If not, then you will have a lot of reading and surfing to do. Two other very good tech types on fixya have nicknames "budmrtn" and "buddymc" !! Read their stuff also for more info. good luck with repair. 12fixlouie north of Windy City

Jan 31, 2010 | ViewSonic VG150 15" LCD Monitor

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The power supply light is green but when i push the power button on the front on monitor nothing happens! Do i need to crack open the case and look for a broken solder connectionor could it be something...

If you can open and removed the power supply/inverter board you can check the caps for obvious damage. *(leakage or swelling)

You can pull the offending cap or just do what I did and replace ALL the caps on that part of the power circuit. It isn't expensive and the board is big enough to handle soldering without a lot of hassles.

I did this for an old Dell monitor this past week and it is up and running!
Nice and bright too.

Good luck!

Nov 22, 2009 | ViewSonic VG150 15" LCD Monitor

1 Answer

I need the power cord

Try RadioShack. They carry most standard power cords. Usually around $5.

Oct 27, 2007 | ViewSonic VG150 15" LCD Monitor

2 Answers

Power switch behavior

kbzaloka: That is not a solutiom you posted. If you can't help, then don't post anything.

russolini: I'm having the same problem with a monitor on my bench right now. I did fix another problem it had. It seems some of the surface-mount electrolytic capacitors are going bad. I will let you know if I solve this fault too. If anyone has lines going through their display, and the sides look ripped or torn, your pixel clock is not working correctly. Try replacing the 22uF capacitor C46 right above the pixel clock generator IC09. This should smooth out the 3.3V supply for this IC and correct the problem.

Jul 01, 2007 | ViewSonic VG150 15" LCD Monitor

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