Yes I saw the post and have not had time to find the schematic, probably have it on another hard drive, but it may be in an Orcad format. Might be able to convert it to PDF.
Having said all that this is a low cost board, single video amp..
No Caps on the neckboard, try reducing the brightness setting and increasing the G2 (Screen control) the video transistors are likely overdriven,
My e-mail rick@niemandisplays.com