As requested by frog213, I am replying to this thread to offer my 2 cents.
The graphical glitches indeed may happen during a battery replacement using the MB power method. Simply continue on with your battery replacement and do not power off your MB until you have completed the process. Not doing so will guarantee your security cart to suicide.
The ground wire found on the 1st gen security boards can indeed be relocated but take care to not accidentally desolder the existing ground wire before you have established your alt ground. Any loss in ground will immediately result in a suicide cart. As it has been previously stated, this wire removal is done for easier future battery replacements using the soldering method.
As some poeople may not be comfortable in soldering, I have elected to use a battery holder in all of my battery replacements to address this issue. This alt method allows for all future battery replacements to be done without the need of soldering. Since the battery holder does take up more room than a standard 1/2 AA battery with axial leads, the CPS3 security cart casing will not snap flush unless it is modified. A whole is then cut into the back of the case to address this issue as well as allow easy access to the battery for the future solderless battery replacement process.
While both the backup battery and MB powering methods will work, I find the battery backup method much more convenient for myself and others. Using it requires only the security cart to be sent in for the replacement and not the entire CPS3 MB setup or its memory DIMMS.
While I have had 55 successful battery replacements, 10 of them have failed. To better illustrate, I have included a picture of some of the replaced batteries that I have kept. It is because of these failures that I have imposed a temporary moratorium on my CPS3 battery replacement service. I hope to make it available once again as early as next month. Thanks for reading.