Sony KD-34XBR960 (DA-4 chassis) 7 blinks no HV...Help me understand!

[Electronic M]

So this is my second DA-4 chassis HD-CRT Sony I still have the old one and it still works so I can check voltages on the old one.
The new one was being a good set until a little over a week ago when it wouldn't fully power on (HV wouldn't come up and got 3 relay clicks instead of 1) and gave me the the 7-blink error code. (My old one did the same when the MCZ3001 for the HV was failing and came right back after a new chip was installed.) Not having time to immediately deal with the issue looking at threads on this I figured out I could leave it unplugged overnight and it would self heal.... About a day ago it refused to self heal.

About 8 hours ago I got to work and replaced the MCZ3001D (IC8002) with an IC socket and a new spare...It didn't fix it. I know the new chip is good because I can run it down to my old working set plug the chip in and the other set will work fine. I'm fairly sure the other MCZ in the set (the DA-4 uses 2 MCZ chips) IC6501 is good because it supplies the bias voltages that circuits like the blink error circuit use to operate.
So far I know that the 15V line that feeds the anode of D8006 is matches voltage between the working and dead sets. I've confirmed fusible resistors R8201, 8051, 8061, 8058, and 6510 are good. I've also changed caps C8025, 8024, 8031, and 8033 and it's made no difference. I can also confirm the drain supply voltage to Q8014 is present.
The only odd thing I found is the voltage on pin 8 of MCZ (IC8002) seems to be 2V higher on the dead set... I'm not sure what would cause that.

I haven't done a full voltage comparison between both chips. It kinda scares me taking measurements on the chip in the good set as I'm worried I'll accidentally short pins on the good set taking measurements and end up with 2 dead sets instead of 1.

Does anybody have any troubleshooting advice? The dead set is my main daily driver TV and the longer it's out of commission the bigger the problem for me it becomes.