ViewSonic VG150 15" LCD Monitor Logo

Related Topics:

Posted on Aug 18, 2007

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?

  • hump234 Aug 21, 2007

    Thanks. I have the back off. It is the switch because that was what had been problematic for months. It had needed several prods to get it to work each time. I bridge it with a screwdriver and the monitor goes on or off as required. I bought a switch from Radio Shack, will solder that in and build a new switch housing (it's a bigger switch).

  • Anonymous Mar 27, 2014

    It's got a bit of caseing at top on the back of the tower with rectangle hole with a little pad lock above it you can slide it back how do I open it


1 Answer



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.

Add Your Answer


Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:


Suddenly stopped working - perfect one day and dead the next. I was told by the person installing my set top box that it was probably a small valve, easy to replace. is this correct, if so how do I go...

hi...if your friend say so it not valve rather a fuse bulb!!!! you can find it inside the casing..
try to unscrew the top casing...if you see the power supply section (mostly w/ many capacitors and power switching transistors)..
if you can find the glass like tube...if there's a light discoloration..replace it w/ same type....
also check the power cord if there's a cut or open wire....
hope this help..good day please rate and vote....

Inherited this 2200 w/ new political office. Was working fine and making clear copies - then error code E000000-0000. Restarted machine - tried Press * Press 2 Press 8 Press * - got nothing. Help.

Indicates either of the following: the main thermistor (TH1) has poor contact
or an open circuit; the thermal switch (TP1) has an open circuit; the
main/sub heater has an open circuit; the main power supply PCB is faulty;
the DC controller PCB is fatly; the door switch is faulty.

In the case of E000 through E003, the code will not be reset when the main
power switch is turned off, requiring the use of service mode
However, if E001 or E003 is detected within 3 sec after the front door
switch is identified to have been opened or closed, the code will be reset
when the main power switch is turned off and then on. This consideration is
to prevent a service call in response to an error detected when the switch
operation is not fully stable (as immediately after turning off and then on
the main power switch).

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.

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

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!

Comp. does'nt turn on. power is good

Your question fails to provide sufficient information.

.."doesn;t turn on power good...."
do any lights on the pc illuminate
was it working before, and did it close down correctly
has it possibly been hit by lightning
have you recently opened the case to install new hardware?

Possible causes of a failed power up.
dead power supply
a video card not seated in its slot correctly
dud motherboard
motherboard installed incorrectly
no Bios battery on motherboard
faulty wall switch
faulty power pack switch
no ram installed

and on and on

thanks for using FIXYA

Lenovo R61 Dead

The power supply in most computers has a fuse, either internal or external, that can blow without you noticing. Basically, you've been on battery operation this whole time, and the battery's finally gone dead.
It will be necessary to open the case and examine the power supply section. It may be possible to replace the fuse yourself, but any operation of this nature that involves opening the case will void any warranty you may have.
Not finding what you are looking for?


Ask a Question

Usually answered in minutes!

Top ViewSonic Computers & Internet Experts

Cindy Wells

Level 3 Expert

6677 Answers

Rob Hill
Rob Hill

Level 3 Expert

1480 Answers

ADMIN Andrew
ADMIN Andrew

Level 3 Expert

65659 Answers

Are you a ViewSonic Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides