The unit looks fantastic. Great job !
I'll just throw this out because the title was a generic 8753. On my 8753C, since replaced by PNA but waiting to go on Ebay when I get a chance, I wanted to replace the Sony Trinitron display module with an LCD.
The screen format is somewhat odd, like 512x384 (from my memory), which actually turns out being an old Apple format. Horizontal sweep was also not quite a today standard.
I ended up, temporarily, wiring up a GB8220 arcade type conversion board ($20 on ebay), a sync separator chip with a few passive parts, and a VGA input, 1024x768 LED backlight display.
The setup was tricky but when it worked, it was quite lovely. Your graphics obviously are not going to be re-painted at the higher res but it looked great.
This was far less effort than my alternative which was going to be a quick re-education on FPGA/RAM as a DIY buffer/format converter. Others on this forum have taken the latter approach quite successfully on a Tek Nu-Color LCD replacement (I think).
At that point I came upon some NOS Sony monitors and dropped the project. It's still good to keep in mind for older equipment, especially with an oddball video and sync capability.
The 8753C/85047A are in great shape if anyone has interest north of Boston. This is just reference information since this is not a for sale thread