Beginner needs help with ISP of MAX7000

I appreciate your taking the time to share your wisdom on this. I have only limited background in electronics so I am struggling somewhat. I see that you are correct that the 7032V simply does not have the JPEG capability even off of the board. I looked at the 7032AE data sheet and while it shares the same pinouts as mine and can operate at 3.3 volts, pin 3 on the EPM7032V J-lead package that I have is a dedicated power-down function as seen on page 78 of the link you provided above. On the non-V chips it is just listed as Vcc. This chip is in an old Fluke ESP-4000 hand-held network tester and I am guessing that the power-down function is used. Can you predict what the effect of asserting that pin low on the 7032AE chip would be? Just to show the extent of my ignorance, there are 4 pins labeled Vcc, are all required to be powered or are any of them in common? If in common, could pin 3 simply be left unconnected? I welcome help from anyone, thanks.