I am attempting to disassemble my Zenith data System ZF-148 to inspect the boards in search of a video issue however I cannot seem to get the power supply unit off the board. The PSU is either glued in place or there is another screw under the cork foot of the case. If there’s another screw I’ll have to remove that cork footpad on the case, I just didn’t want to remove that foot pad without knowing if I absolutely have to. Does anyone know for sure?