I need to remove the viewsonic VX2433wm stand.

SOURCE: viewsonic vg2021m base mount

Gently lay the nonitor, face down, on a table such that it will not be damaged while you remove the base. You will find a curved strip of plastic about 1 1/4 inch wide and 4 inches long. Near the center of this strip, you will find two parallel plastic ridges. These are clips that hold the base to the monitor support post. Squeeze these clips together to remove the base from the support post. I was able to squeeze the rear strip toward the rear of the base and ease the rear of the base off that clip and it came apart ok. It is a bit tricky, but doable. Good luck.
Orval

SOURCE: 30 bad VP930B's may have green LED for an instant that's it. No display either.

Yes this is a very common problem on the VP930b. The fault is with the crappy CapXon capacitors (worst in the industry). As mentioned above, replace the 220uF@25V and 1000uF@16V capacitors. The other two never go bad. Make sure you replace the four above even if they look good. I would recommend using 35V and 25V respectively.

Note, if your monitor serial number starts with Q8H you may have a bad IC on the main board. Q8 often goes bad a few months after the capacitors do. If they are warranty they will have to be sent to Viewsonic or a local authorized service center.
If not warranty, you can solder a wire from the 3 pins on the left side of the IC to the four pins on the right side. One pin on the left side is the on/off pin for this IC and should be left alone. This will bypass the IC allowing +5V to the LCD all the time. However, if the monitor ever shows scrambled graphics after turning it on then turn it off using the main power switch in the back and turn it back on, it should be fine.

SOURCE: at the centre of my viewsonic monitor model:E70fB

Please try to Turn the monitor off. Hold down the Menu button while the monitor is turned off, then press the Power button again to turn the monitor back on. This might unlock your OSD menu and remove that message from your screen. regards

SOURCE: Viewsonic VX922 - black screen of death and the blinking (mocking!) green led

Really if this happens then you may want to contact viewsonic to see if it still in warrant. Reminder that most of their monitors have a 3 year warrany from the date of purchase. So make sure that you have your proof of sales/receipt/POP/invoice or what ever you want to call it ready. This model is old so they will ask for it if its a first time repair.

SOURCE: How do I get my Viewsonic VX922 LCD monitor apart?

in a similar situation the solution was an Ipod case opener used along the perimeter to release the plastic catches..